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ANEMIA
LAXMI DAHAL
LECTURER
2/13/2023 1
ANEMIA
INTRODUCTION
 Anemia is a common problem in children. About 20% of children in the
U.S. will be diagnosed with anemia at some point.
 Red blood cells carry oxygen throughout the body using a protein called
hemoglobin. If there aren’t enough of these cells or this protein, anemia
results.
 Anemia is a sign, it is important to investigate the cause of anemia to
ensure that it is not due to a serious underlying ailment and to define the
correct management approach. 2/13/2023 2
DEFINITION
 Anemia is present when the hemoglobin level in the blood is two
standard deviations below the mean for the particular age and sex.
 The physiologic definition of anemia is a condition in which tissue
hypoxia occurs due to inadequate oxygen carrying capacity of blood.
 According to the National Family Health Survey {NFHS-4) data, the
incidence of anemia in urban children is 55.9%, rural is 59.4% and
overall is 58.4%.
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CLINICAL FEATURES
 Tiredness, lassitude, easy fatigability and generalized
muscular weakness are most frequent and the earliest
symptoms of anemia.
 This presents as poor feeding, irritability and inadequate
school performance; pallor.
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CLINICAL FEATURES
 Pallor of nail beds, oral mucous membranes and
conjunctivae.
 Dyspnea on exertion, tachycardia and palpitation
 Hemic murmurs. They are heard in the pulmonary
area.
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CLINICAL FEATURES
 Systolic bruits (obstructed flow), postural hypotension and congestive heart
failure may be seen in patients with moderate to severe anemia.
 Nervous system symptoms: dizziness, headache, humming in ears, fainting, tinnitus,
lack of concentration and drowsiness; with severe anemia, clouding of consciousness.
 Severe anemia is characterized by a high output state with elevated pulse pressure
and a 'collapsing' character.
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CLINICAL FEATURES
 Electrocardiographic changes may be found in approximately 30% of patients with
hemoglobin of less than 6 g/dL.
 Findings on ECG are normal QR waves, depression of the ST segments, and
flattening or inversion of T waves.
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APPROACH TO DIAGNOSIS
1. History may give clues for the etiology of anemia.
 Obstetric history of maternal infections, anemia or collagen vascular diseases, or
presence of prematurity, blood loss, jaundice (secondary to ABO or Rh
incompatibility, G6PD deficiency and sepsis), hemangioma or cephalohematoma.
 History is taken regarding the diet, type and quality of milk, time of weaning and
intake of vitamins and hematinics.
 Nutritional iron deficiency anemia often occurs between 6 months and 2 years due
to inadequate weaning, chronic diarrhea or cow milk allergy.
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APPROACH TO DIAGNOSIS
 Adolescent growth spurt, menstruating and pregnant teens are at risk for iron
deficiency.
 A vegetarian diet and use of goat milk may result in megaloblastic anemia.
 History of pica, drug intake, chronic diarrhea, acute and prolonged infections, liver
and renal disease, transfusions and age of onset of symptoms should be taken.
 Thalassemia major usually presents at 4-6 months of age, and 70% present with
symptoms by one-year.
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APPROACH TO DIAGNOSIS
 A family history of anemia, gallstones and requirement for blood transfusions may
suggest the diagnosis of chronic hemolytic anemia, including hereditary spherocytosis
or G6PD deficiency.
2. Examination
 Examination is done for clues to the cause of anemia, e.g. radial limb anomalies
(bone marrow failure), splenomegaly (hemolytic anemia, infection, storage diseases),
and lymphadenopathy and hepatosplenomegaly (malignancies, malaria, tuberculosis).
Petechia, purpura, icterus and bossing also help to diagnose the cause.
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RADIAL LIMB ANOMALIES
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APPROACH TO DIAGNOSIS
Laboratory investigations
 The complete hemogram will reveal, if there is isolated anemia, or if other cells are
affected.
 The red cell indices will demonstrate the type of anemia; while the mean corpuscular
volume (MCV) denotes the size of the red cells, the mean corpuscular hemoglobin
(MCH) and mean corpuscular hemoglobin content (MCHC) provide information
on red cell hemoglobinization.
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LABORATORY INVESTIGATIONS
 Using the MCV, anemia can be classified into microcytic/normocytic/macrocytic
anemia.
 The red cell distribution width (RDW) gives the size difference in the red blood
cells, low RDW means all the red blood cells are small and uniform in size, while a
large RDW shows that the cells vary in size greatly.
 Examination of the peripheral smear will reveal the red cell morphology. Presence of
schistocytes, polychromasia, specific red cell morphology or parasites may help in
making the diagnosis.
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RDW
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SCHISTOCYTES
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Schistocytes are fragmented
red blood cells that can take on
different shapes.
POLYCHROMASIA
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Polychromasia is the presentation of multicolored red
blood cells in a blood smear test.
LABORATORY INVESTIGATIONS
 The reticulocyte count helps to determine if anemia is caused by red cell destruction
or decreased production.
 In cases of anemia with increased reticulocyte count, a Coombs test will help to
identify, if this is due to immune or hereditary hemolytic anemia.
 When nutritional anemias are suspected, iron status, vitamin B12 and folic acid
levels determined.
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TYPES OF ANEMIA
1. Iron deficiency anemia
2. Megaloblastic anemia
3. Hemolytic anemia
4. Thalassemia
5. Sickle cell anemia
6. Aplastic anemia
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INTRODUCTION
 Iron-deficiency anemia is anemia caused by a lack of iron.
 Iron deficiency anemia occurs when there is a decrease in total iron body content,
severe enough to diminish erythropoiesis and cause anemia.
 It is the most common cause of anemia worldwide.
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CLINICAL EVALUATION
 Dietary history: intake of milk, weaning foods and supplements.
 Pica increases the risk of infestations and lead poisoning.
 Common features of anemia are present.
 Behavioral symptoms: irritability and anorexia, precede weakness, fatigue, leg
cramps, breathlessness and tachycardia.
 Congestive heart failure and splenomegaly may occur with severe, persistent,
untreated iron deficiency.
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TREATMENT
 The cause of anemia should be identified and corrected.
 Hookworm infestation is the commonest cause of occult gastrointestinal blood loss
in rural India at all ages.
 Close follow-up is required to assess for adequate response and correction of anemia,
this will help to identify iron therapy failure.
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DIETARY COUNSELING AND TREATMENT
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ORAL IRON PREPARATIONS
 Should be taken on an empty stomach or in
between meals for best absorption.
 The most cost- effective oral preparation is
ferrous sulfate.
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TREATMENT
 The dose for treatment of anemia is 3-6 mg/kg/day elemental iron.
 The reticulocyte count increases within 72-96 hours after initiating therapy.
 After correction of anemia, oral iron should be continued for 4-6 months to replenish
iron stores.
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TREATMENT
 As iron deficiency anemia is readily corrected with medication, blood transfusions
should be avoided in young, stable patients.
 Red cell transfusions are needed in emergency situations, as in patients where the
rate of blood loss exceeds the expected rise of hemoglobin, for urgent surgery,
hemorrhage or severe anemia with congestive cardiac failure.
 In very severe anemia with congestive cardiac failure, transfusions must be given very
slowly (2-3 ml/kg) with monitoring and diuretic therapy if necessary.
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MEGALOBLASTIC ANEMIA
 Megaloblastic anemia is a distinct type of anemia characterized
by macrocytic red blood cells and erythroid precursors, which
show nuclear dysmaturity.
 It impaired DNA synthesis that results in enlarged red blood
cells.
 The incidence varies with dietary practices and socioeconomic
patterns.
 A study has estimated the incidence of folate deficiency as 6.8%,
vitamin B12 as 32% and combined deficiency as 20% in north
Indian children. 2/13/2023 44
ETIOLOGY
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VITAMIN B12 DEFICIENCY
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ABSORPTION OF VIT B12
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ETIOLOGY
Folic acid deficiency
 Folate deficiency can be caused by decreased ingestion, impaired absorption
impaired utilization and increased requirement.
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ETIOLOGY
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CLINICAL MANIFESTATIONS
 Anemia, anorexia, irritability and easy fatigability.
 Patients should be examined for signs of thrombocytopenia
and neutropenia.
 Features characteristically found in megaloblastic anemia
include glossitis, stomatitis and hyperpigmentation of the
skin on knuckles and terminal phalanges, enlargement of
liver and spleen (30-40% cases).
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CLINICAL MANIFESTATIONS
 Petechiae and hemorrhagic manifestations have been
reported in 25% cases.
 Pancytopenia.
 A neurologic examination is mandatory, it may reveal loss
of position and vibratory sensation, memory loss, confusion
and neuropsychiatric symptoms can occur.
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LABORATORY EVALUATION
 The reticulocyte count should be performed; if available, serum B 12 and folate
levels are assayed.
 The Schilling test, (to determine absorption of vitamin B-12) which requires radioactive labeled
B12, is used to identify pernicious anemia and for evaluation of deficiency states.
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LABORATORY EVALUATION
 Bone marrow evaluation should be performed in any child with more than one
abnormal hematological cell line.
 Serum chemistry may reveal elevated lactic dehydrogenase (LDH) and bilirubin.
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DIFFERENTIAL DIAGNOSIS
 Other causes of macrocytosis should be considered in the differential diagnosis of
megaloblastic anemia.
 These causes include aplastic anemia and marrow failure syndromes, congenital
dyserythropoietic anemia, chronic liver disease, hypothyroidism, neoplastic and HIV
infections.
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TREATMENT
 Treatment depends on the underlying cause.
 If the cause is not identified, therapeutic doses of folate (1-5 mg/ day) and vitamin
B12 (1000 µg) are administered.
 Only folate therapy may correct the anemia, but will not correct cobalamin
deficiency-associated neurological disorder and result in the progression of
neuropsychiatric complications.
 Folate deficiency due to dietary insufficiency or increased demands is best treated
with folate supplements.
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TREATMENT
 Folate deficiency due to use of anti-folate medications (proguanil, pyrimethamine and
trimethoprim) is managed by reducing or eliminating the implicating agent and
supplementation with folic acid.
 Folate is available as 5 mg tablet and overdose is not associated with any adverse
effects; a dose of 1-5 mg/day is recommended for 3-4 weeks.
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TREATMENT
 Parenteral vitamin B12 at a dose of 1 mg (1000 µg) is given intramuscularly; lower
doses (250 µg) can be used in infants.
 A decrease in MCV, reticulocytosis and higher platelet and neutrophil counts is
observed within a few days of therapy.
 In patients with pernicious anemia and malabsorptive states, vitamin B12 (1000 µg)
should be given IM daily for 2 weeks, then weekly until the hematocrit value Is
normal and then monthly for life.
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TREATMENT
 Patients with neurological complications should receive 1000 µg IM every day for 2
weeks, then every 2 weeks for 6 months and monthly for life.
 Oral supplements can be administered; however, absorption is variable and may be
insufficient in some patients.
 In dietary insufficiency, no standard duration of therapy has been defined. Dietary
counseling is advised, along with vitamin B12 supplements (oral daily or parenteral
dose every 3-12 months).
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SOURCE OF VIT B12 AND FOLIC ACID
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HEMOLYTIC ANEMIA
 The term 'hemolytic anemia' is limited to conditions in which rate of red cell
destruction is accelerated and ability of the bone marrow to respond to the anemia is
unimpaired.
 Under maximal stimulation, the normal marrow is capable of increasing its production
about 6-8 times its basal level.
 The reticulocyte count is useful in determining the rate of red cell destruction.
 The normal reticulocyte count value in the newborn is 3.2+1.4% and in children
1.2+0.7%.
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PATHOPHYSIOLOGY
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CLINICAL FEATURES
 In rapidly occurring hemolysis, the symptoms are more
numerous and pronounced.
 Evidence of anemia: weakness, pallor, fatigue may be seen.
 jaundice is a prominent finding and red urine occurs in
intravascular hemolysis.
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CLINICAL FEATURES
 Splenomegaly is seen in auto immune and many congenital forms of hemolytic
anemia.
 The presence of gallstones and icterus (hereditary spherocytosis), hemolytic /
thalassemic facies (thalassemia major, intermedia), leg ulcers (sickle cell disease) can
help lead investigations, confirmatory tests are still required.
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LABORATORY MANIFESTATIONS
 The Coombs test is the most important initially test to perform to define the etiology of
hemolysis.
 A direct antiglobin (direct Coombs) test is positive in most cases of immune
hemolytic anemia.
 The level of indirect bilirubin provides evidence for hemolysis, it is relatively
insensitive and is elevated only if the liver function is impaired or when hemolysis is
extensive.
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MANAGEMENT
 In an acute attack of hemolysis, it is important to maintain fluid balance and renal
output.
 Shock is managed by standard measures.
 Blood transfusions.
 Even with careful blood matching, destruction of transfused blood with increased
burden on excretory organs and risk of thromboses may occur.
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MANAGEMENT
 Acute autoimmune hemolytic anemia is treated with steroids (prednisone 1-2
mg/kg/day), gradually tapered over several months, once the patient shows resolution of
hemolysis.
 In chronic hemolysis, the etiology needs to be investigated and treated accordingly.
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THALASSEMIA
 Thalassemia is a Greek term derived from thalassa, which means "the sea"
(Mediterranean Sea) and emia, which means "related to blood".
 It occurs due to globin gene defects, one of the commonest monogenic diseases.
 Molecular biology and genetics of thalassemia syndromes have revealed more than
200 mutations, across populations from Southeast Asia to Africa.
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THALASSEMIA
 Carrier rates for thalassemia reported in North Indians, varies in different ethnic
groups from 3-17%.
 The major hemoglobin in children after 1 year of age, HbA constitutes
approximately 90%, and a minor component, HbA2 accounts for 23%.
 The main hemoglobin in fetal life is HbF of which only traces remain after 1 year of
life.
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PATHOPHYSIOLOGY
 Thalassemia are inherited disorders of hemoglobin synthesis that result from
alteration in the rate of globin chain production.
 A decrease in the rate of production of a globin (alpha, beta, gamma, delta) impedes
hemoglobin synthesis and creates an imbalance with normally produced globin chains.
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PATHOPHYSIOLOGY
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TYPES
1. Beta thalassemia
2. Alpha thalassemia
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BETA THALASSEMIA
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BETA THALASSEMIA
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BETA THALASSEMIA
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- Deficiency of beta globin leads to free alpha
globin.
- Cause hemolysis in bone marrow and spleen.
- Hemolysis causes Hb to enter in blood,
heme= iron + bilirubin
(hemochromatosis+ Jaundice)
BETA THALASSEMIA
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PRESENTATION
 hypochromic, microcytic anemia that does not respond to iron supplementation.
 Thalassemia minor are usually asymptomatic.
 Children with thalassemia major usually demonstrate no symptoms until about
months of age
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BETA THALASSEMIA
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BETA THALASSEMIA
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SPECTRUM OF B THALASSEMIA
Thalassemia major: The condition is characterized by transfusion dependent anemia,
splenomegaly, bony deformities, growth retardation and hemolytic facies in untreated
or inadequately treated individuals.
 Blood smear shows hypochromia, microcytosis, fragmented and nucleated red cells,
polychromasia and occasionally immature leukocytes.
 Organomegaly is reduced in well-transfused patients
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BETA THALASSEMIA
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BETA THALASSEMIA
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PREVENTION AND MANAGEMENT
 Genetic counseling: is needed for the couple and their family to prevent the birth of
other children with thalassemia major.
 Prenatal testing is available to ensure the second child of the afflicted family does
not have thalassemia major.
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BETA THALASSEMIA
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MANAGEMENT
 Blood transfusion should be initiated at an early
age when the child is asymptomatic and attempts
should be made to keep pretransfusion hemoglobin
level at 9-10 g/dL (to promote growth and prevent
deformities).
 A normal diet is recommended, with the following
supplements: Folic acid, small doses of ascorbic
acid (vitamin C), and alpha-tocopherol (vitamin E).
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MANAGEMENT
Blood Transfusions and Infections
 After multiple transfusions, patients often develop
transfusion reactions or alloimmunization to red cell
antigens. These complications can be minimized by using
leukocyte filters during transfusion or having blood banks
prepare leuko-poor packed red cells.
 Administration of acetaminophen and
diphenhydramine hydrochloride before transfusion(s)
minimizes febrile or allergic reactions.
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BLOOD TRANSFUSIONS AND INFECTIONS
 The major complications are those related to transmission of blood-borne viral
infections.
 Hepatitis B vaccination and regular assessment of hepatitis C and HIV status are
part of routine care.
 Folate supplements are required; ferritin levels are used to monitor iron overload.
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IRON OVERLOAD
 Iron overload is a major cause of morbidity.
 The excessive load of iron is due to increased gastrointestinal iron absorption as well
as repeated transfusions.
 Patients show signs of endocrinopathy affecting pancreas, thyroid and parathyroid
glands, decreased growth and lack of sexual maturation.
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CHELATION THERAPY
 The introduction of chelating agents capable of removing excess iron from the body
has dramatically increased life expectancy.
 The cost, however, has resulted in poor compliance and inadequate dosing of iron
chelators in many patients.
 Combination therapy may be needed in children not adequately controlled by
appropriate use on a single iron chelator.
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CHELATION THERAPY
 Deferoxamine (DFO) is administered by subcutaneous infusion pump (40-60 mg/kg/
day over 8-12 hours for 5-6 days/week).
 Higher doses of DFO may be administered IV when serious iron overload such as
cardiac failure occurs.
 Eye examinations, hearing tests and renal function tests are required to monitor the
effects of DFO therapy.
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CHELATION THERAPY
 Deferasirox is an oral chelating agent, which binds iron with high affinity and is
excreted in bile and via the feces.
The dose is 30 mg/kg dissolved in water and taken daily.
 Deferiprone is an oral chelating agent, which is less effective than DFO in preventing
organ damage.
It is administered at a dose of 75 mg/ day, but should be given under supervision for side
effects including arthritis, neutropenia and agranulocytosis.
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SPLENECTOMY
 The spleen acts as a store for nontoxic iron, protecting the body from extra iron thus
early removal of the spleen may be harmful.
 Splenectomy is justified only in hypersplenism, leading to excessive destruction of
erythrocytes and thus increasing the need for frequent blood transfusions, resulting in
further iron accumulation.
 Patients who require more than 200-250 mL/ kg of packed red blood cells per year to
maintain hemoglobin may benefit from this procedure.
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SPLENECTOMY
 Pre-splenectomy immunizations and prophylactic antibiotics have significantly
decreased infections in splenectomized children.
 The procedure is delayed until the child is aged 5 years old. This is rarely required in
children receiving adequate transfusion therapy.
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ALPHA THALASSEMIA
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ALPHA THALASSEMIA
 Alpha-thalassemia: is a form
of thalassemia involving the
genes HBA1 and HBA2.
 Alpha-thalassemias are most
commonly inherited in
a Mendelian recessive manner.
 They are also associated with
deletions of chromosome 16p.
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PATHOPHYSIOLOGY
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ALPHA THALASSEMIA
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ALPHA THALASSEMIA
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ALPHA THALASSEMIA
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ALPHA THALASSEMIA
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ALPHA THALASSEMIA
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ERYTHROBLASTOSIS FETALIS/ HYDROPS FETALIS
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- life-threatening condition in which a fetus or
newborn has an abnormal buildup of fluids in the
tissue around the lungs, heart, or abdomen, or
under the skin.
- 1 out of every 1,000 births.
ALPHA THALASSEMIA
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ALPHA THALASSEMIA
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ALPHA THALASSEMIA
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ALPHA THALASSEMIA
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COMPLICATIONS
 Bone problems: "hair on end" appearance
of the skull, prominence of the upper incisors.
 These changes contribute to the classic
hemolytic/ chipmunk facies.
 Osteoporosis and osteopenia may result in
fractures; the child may need treatment with
calcium, vitamin D and bisphosphonates to
improve bone density. 2/13/2023 110
OTHER COMPLICATIONS
 Extramedullary hematopoiesis: This usually occurs in patients with
thalassemia intermedia who are not receiving transfusion therapy.
 They may cause neuropathy or paralysis from compression of the spine
or peripheral nerves.
 Compression fractures and paravertebral expansion of extramedullary
masses, which behave like tumors, are seen during the second decade of
life.
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OTHER COMPLICATIONS
 Psychosocial: as these children survive into adulthood, problems related
to employment, marriage and having families, as well as the stress of
chronic illness will need to be addressed.
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CURE OF THALASSEMIA MAJOR
 Hematopoietic stem cell transplantation (HSCT) Is the only known
curative treatment for thalassemia.
 Poor outcome of HSCT occurs in patient with hepatomegaly, portal
fibrosis and inadequate chelation prior to transplant.
 The event-free survival rate for patients who have all three features is
59%, compared to 90% for those who do not.
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HEMATOPOIETIC STEM CELL TRANSPLANTATION
 Bone marrow transplantation (BMT) is more correctly called hematopoietic stem cell
transplantation (HSCI).
 This is an established life-saving procedure for a number of malignant and non-malignant
diseases.
 Types:
(1) Autologous transplant-when the source of stem cells is harvested from the patient and
(2) Allogenek transplant-when stem cells are collected from a human leukocyte antigen
(HLA) matched sibling or unrelated donor.
The commonly used sources of hematopoietic stem cells are cytokine mobilized peripheral
blood, bone marrow and umbilical cord blood.
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SICKLE CELLANEMIA
 Occurs in India with a gene
frequency of 4.3%, is relatively
common in multiple states
including Odisha, Maharashtra,
Madhya Pradesh, Jharkhand and
Gujarat.
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PREVALENCE
 The Ministry of Health estimates that 2,000 Tharu people have sickle cell anemia
throughout the country, with heavy prevalence in the midwestern and farwestern
regions of the nation, where more than 1,300 people have been diagnosed since 2011.
According to the 2011 census, there are 1.74 million Tharus in Nepal.
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SICKLE CELLANEMIA
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SICKLE CELLANEMIA
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PATHOPHYSIOLOGY
Sickle cell anemia, an autosomal recessive disease, results from the substitution of
valine for glutamic acid at position 6 of the beta-globin gene.
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PATHOPHYSIOLOGY
 Sickle red cells obstruct the microcirculation, resulting in tissue hypoxia that
perpetuates sickling.
 The affected cells are rapidly hemolyzed and have a lifespan of app 10-20
days.
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PATHOPHYSIOLOGY
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PATHOPHYSIOLOGY
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PATHOPHYSIOLOGY
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PATHOPHYSIOLOGY
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TYPES OF CRISIS
i. Vaso-occlusive crisis
- this crisis occurs when the microcirculation is obstructed by sickled red cells,
resulting in ischemic injury.
- Pain is the chief complaint; bones (e.g. femur, tibia and lower vertebrae) are
frequently involved.
- Vaso-occlusion may present as dactylitis or as hand and foot syndrome (painful
swollen hands and/ or feet in children).
- Vaso-occlusion may mimic an acute abdomen. The spleen develops auto infarcts and
becomes fibrotic.
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VASO-OCCLUSIVE CRISIS
 In the kidney, it results in papillary necrosis, which results in papillary necrosis,
which results in isosthenuria (inability to concentrate urine).
 Vaso-occlusive crisis can involve the lungs and cause acute chest syndrome; retinal
hemorrhages in the eye and involvement of corpus cavernosum, leading to
priapism.
 Involvement of the femoral head results in avascular necrosis.
 Cerebrovascular accidents may occur in children, and trend to be recurrent.
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TYPES OF CRISIS
ii. Acute chest syndrome: this is a vaso-occlusive crisis, with chest pain, cough,
tachypnea, dyspnea, hypoxemia and fever. The condition requires hospitalization with
need for IV fluids, oxygen, bronchodilators and antibiotics (including for Mycoplasma
and Chlamydia).
iii. Sequestration crisis: sickle cells block splenic outflow and pooling of blood in the
engorged spleen, resulting in splenic sequestration.
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TYPES OF CRISIS
iv. Risk of infection: Patients are susceptible to infection with encapsulated organisms
(H. influenzae, S. pneumoniae) and other microbes (Salmonella, Mycoplasma, S.
aureus, E. colz).
iv. Aplastic crisis: Aplastic crisis occurs when the bone marrow stops producing red
blood cells, following an infection (often parvovirus B19) or associated with folate
deficiency.
The condition is self-limited; supportive care and packed red cell transfusions are
required.
2/13/2023 129
LABORATORY STUDIES
 Anemia and thrombocytosis are commonly found.
 While Leukocytosis is common, white cell count
>20000/mm3 with a shift to the left indicates infection.
 On peripheral smear, sickle-shaped red cells are found
along with target cells.
 Presence of Howell-Jolly bodies indicates functional
asplenia.
 The indirect bilirubin level may be elevated
2/13/2023 130
LABORATORY STUDIES
 If the diagnosis of sickle cell anemia has not been made, the sickling test establishes
the presence of HbS.
 Hemoglobin electrophoresis
2/13/2023 131
ASSESSMENT DURING ACUTE ILLNESS
 In a sick child, blood type and crossmatch is required for probable transfusion.
 X-ray of the chest and bones, and blood culture may be indicated.
 Monitoring of oxygen saturation and arterial blood gases should be advised in
patients in respiratory distress.
 A drop in hemoglobin exceeding 2 g/ dL from baseline indicates splenic
sequestration or aplastic crisis; the reticulocyte count and examination of spleen size
help differentiate these conditions.
 An electrocardiogram is performed, if patient has chest pain and/ or irregular pulse.
2/13/2023 132
HOSPITAL MANAGEMENT
 Hydration and analgesia are the mainstays of treatment in pain crisis.
 Oral hydration is preferred, if the patient is not vomiting and can tolerate oral fluids.
 Narcotic analgesia is frequently used.
 Patients with severe dehydration should receive IV fluids.
 Blood transfusion is required in patients with aplastic and sequestration crisis.
2/13/2023 133
HOSPITAL MANAGEMENT
 Intubation and mechanical ventilation, exchange transfusion may be required, if
cerebrovascular accidents have occurred, or with acute chest syndrome.
 Exchange transfusion consists of replacing the patient red cells by normal red cells,
decreasing sickle hemoglobin (HbS).
 Bone marrow transplant.
2/13/2023 134
FACILITIES IN NEPAL
 Bipanna Nagarik Kosh was started after the Janandolan of 2062 BS. With the country
slowly recovering from the decade long armed conflict, this Koshi was established to
provide some financial relief to people from difficult and expensive diseases.
Cardiovascular diseases, Cancer, Renal failure, Alzheimer's disease, Parkinson's
disease, Head and Spinal injury, Sickle Cell Anaemia and Stroke are covered under
this program.
2/13/2023 135
FACILITIES IN NEPAL
 Those eligible to claim services under the Bipanna Nagarik Koshi will receive the
following:
1. Each patient will be provided NRs. 1,00,000/- as health care expense including
medicines required for disease management
2. For patients with renal impairment (मृगौला रोगीको उपचार सम्बन्धमा)
3. Free haemodialysis and peritoneal dialysis for 1 year
4. NRs. 2,00,000/- as kidney transplant expense
5. NRs. 1,00,000/- in one or more instalments as medicine expense for post-transplant
management
6. NRs. 1,00,000 to purchase medicine post kidney transplant is provided as cash grant. All
other subsidies are provided directly through hospitals in Nepal. 2/13/2023 136
FACILITIES IN NEPAL IN LISTED HOSPITAL FOR SCD
1. Bheri Zonal Hosppital, Banke
2. Lumbini Zonal hospital, Butwal
3. Seti Zonal Hospital, Kailali
4. Mahakali Zonal Hospital, Kanchanpur Mahakali
5. District Hospital, Kapilbasthu
6. District Hospital, Nawalparashi
7. District Hospital, Bardiya
2/13/2023
137
PREVENTIVE CARE
 All children require prophylaxis with penicillin/ amoxicillin, at least until 5 years of age.
 They should receive the pneumococcal, meningococcal and Hemophilus vaccines.
 They should also receive lifelong folate supplements.
 Hydroxyurea, that increases HbF and reduces episodes of pain crises, stroke and acute chest
syndrome, is recommended to be given at a daily dose of 10-15 mg/kg/day.
 Children on hydroxyurea should be monitored with complete blood counts. Patients need to
be screened for gallstones and stroke.
 Genetic counseling and testing should be offered to the family. Parents need to learn to
identify complications.
2/13/2023 138
APLASTIC ANEMIA
 Aplastic anemia is a group of inherited or acquired disorders of the hematopoietic
stem cells.
 The prevalence of bone marrow failure resulting from hypoplastic or aplastic anemia
is 2-6 cases per million in Western literature.
 In India, the prevalence is higher.
2/13/2023 139
2/13/2023 140
PATHOPHYSIOLOGY
2/13/2023 141
PATHOPHYSIOLOGY
2/13/2023 142
2/13/2023 143
CAUSE
2/13/2023 144
2/13/2023 145
TREATMENT
 Supportive care such as packed red cells for anemia, platelets for thrombocytopenia
and antibiotics for infection is needed.
 Hematopoietic stem cell transplant (HSCT) is the only curative therapy.
 Criteria for referral for HSCT is:
(i) patients who are young (<50 years)
(ii) severe aplastic anemia, and
(iii) a matched related sibling donor.
Patients with severe acquired aplastic anemia who cannot undergo HSCT may benefit
from therapy with antithymocyte globulin (ATG) or anti-lymphocyte globulin (ALG)
and cyclosporine. 2/13/2023 146
TREATMENT
 Anti-thymocyte globulin (ATG) is an infusion of horse or rabbit-derived antibodies
against human T cells, which is used in the prevention and treatment of acute
rejection in organ transplantation and therapy of aplastic anemia.
 Anti-lymphocyte globulin (ALG) is an infusion of animal- antibodies against human
T cells which is used in the treatment of acute rejection in organ transplantation.
2/13/2023 147
PROGNOSIS
 Severe anemia can result in high-output cardiac failure/ neutropenia can lead to
bacterial and fungal infections; severe bleeding can occur due to thrombocytopenia.
 The severity and extent of cytopenia determine prognosis.
 With current HSCT regimens, most patients with severe aplastic anemia show 60-
70% long-term survival; better survival is reported in favorable subgroups.
2/13/2023 148
THANK YOU
2/13/2023 149
REFERENCES
 Ghai O, Paul V, Bagga A. Essential Pediatrics. 7th ed. CBS Publisher & Distributers;
2008.
2/13/2023 150

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3. anemia.pptx

  • 2. ANEMIA INTRODUCTION  Anemia is a common problem in children. About 20% of children in the U.S. will be diagnosed with anemia at some point.  Red blood cells carry oxygen throughout the body using a protein called hemoglobin. If there aren’t enough of these cells or this protein, anemia results.  Anemia is a sign, it is important to investigate the cause of anemia to ensure that it is not due to a serious underlying ailment and to define the correct management approach. 2/13/2023 2
  • 3. DEFINITION  Anemia is present when the hemoglobin level in the blood is two standard deviations below the mean for the particular age and sex.  The physiologic definition of anemia is a condition in which tissue hypoxia occurs due to inadequate oxygen carrying capacity of blood.  According to the National Family Health Survey {NFHS-4) data, the incidence of anemia in urban children is 55.9%, rural is 59.4% and overall is 58.4%. 2/13/2023 3
  • 6. CLINICAL FEATURES  Tiredness, lassitude, easy fatigability and generalized muscular weakness are most frequent and the earliest symptoms of anemia.  This presents as poor feeding, irritability and inadequate school performance; pallor. 2/13/2023 6
  • 7. CLINICAL FEATURES  Pallor of nail beds, oral mucous membranes and conjunctivae.  Dyspnea on exertion, tachycardia and palpitation  Hemic murmurs. They are heard in the pulmonary area. 2/13/2023 7
  • 9. CLINICAL FEATURES  Systolic bruits (obstructed flow), postural hypotension and congestive heart failure may be seen in patients with moderate to severe anemia.  Nervous system symptoms: dizziness, headache, humming in ears, fainting, tinnitus, lack of concentration and drowsiness; with severe anemia, clouding of consciousness.  Severe anemia is characterized by a high output state with elevated pulse pressure and a 'collapsing' character. 2/13/2023 9
  • 10. CLINICAL FEATURES  Electrocardiographic changes may be found in approximately 30% of patients with hemoglobin of less than 6 g/dL.  Findings on ECG are normal QR waves, depression of the ST segments, and flattening or inversion of T waves. 2/13/2023 10
  • 11. APPROACH TO DIAGNOSIS 1. History may give clues for the etiology of anemia.  Obstetric history of maternal infections, anemia or collagen vascular diseases, or presence of prematurity, blood loss, jaundice (secondary to ABO or Rh incompatibility, G6PD deficiency and sepsis), hemangioma or cephalohematoma.  History is taken regarding the diet, type and quality of milk, time of weaning and intake of vitamins and hematinics.  Nutritional iron deficiency anemia often occurs between 6 months and 2 years due to inadequate weaning, chronic diarrhea or cow milk allergy. 2/13/2023 11
  • 12. APPROACH TO DIAGNOSIS  Adolescent growth spurt, menstruating and pregnant teens are at risk for iron deficiency.  A vegetarian diet and use of goat milk may result in megaloblastic anemia.  History of pica, drug intake, chronic diarrhea, acute and prolonged infections, liver and renal disease, transfusions and age of onset of symptoms should be taken.  Thalassemia major usually presents at 4-6 months of age, and 70% present with symptoms by one-year. 2/13/2023 12
  • 13. APPROACH TO DIAGNOSIS  A family history of anemia, gallstones and requirement for blood transfusions may suggest the diagnosis of chronic hemolytic anemia, including hereditary spherocytosis or G6PD deficiency. 2. Examination  Examination is done for clues to the cause of anemia, e.g. radial limb anomalies (bone marrow failure), splenomegaly (hemolytic anemia, infection, storage diseases), and lymphadenopathy and hepatosplenomegaly (malignancies, malaria, tuberculosis). Petechia, purpura, icterus and bossing also help to diagnose the cause. 2/13/2023 13
  • 15. APPROACH TO DIAGNOSIS Laboratory investigations  The complete hemogram will reveal, if there is isolated anemia, or if other cells are affected.  The red cell indices will demonstrate the type of anemia; while the mean corpuscular volume (MCV) denotes the size of the red cells, the mean corpuscular hemoglobin (MCH) and mean corpuscular hemoglobin content (MCHC) provide information on red cell hemoglobinization. 2/13/2023 15
  • 17. LABORATORY INVESTIGATIONS  Using the MCV, anemia can be classified into microcytic/normocytic/macrocytic anemia.  The red cell distribution width (RDW) gives the size difference in the red blood cells, low RDW means all the red blood cells are small and uniform in size, while a large RDW shows that the cells vary in size greatly.  Examination of the peripheral smear will reveal the red cell morphology. Presence of schistocytes, polychromasia, specific red cell morphology or parasites may help in making the diagnosis. 2/13/2023 17
  • 19. SCHISTOCYTES 2/13/2023 19 Schistocytes are fragmented red blood cells that can take on different shapes.
  • 20. POLYCHROMASIA 2/13/2023 20 Polychromasia is the presentation of multicolored red blood cells in a blood smear test.
  • 21. LABORATORY INVESTIGATIONS  The reticulocyte count helps to determine if anemia is caused by red cell destruction or decreased production.  In cases of anemia with increased reticulocyte count, a Coombs test will help to identify, if this is due to immune or hereditary hemolytic anemia.  When nutritional anemias are suspected, iron status, vitamin B12 and folic acid levels determined. 2/13/2023 21
  • 26. TYPES OF ANEMIA 1. Iron deficiency anemia 2. Megaloblastic anemia 3. Hemolytic anemia 4. Thalassemia 5. Sickle cell anemia 6. Aplastic anemia 2/13/2023 26
  • 28. INTRODUCTION  Iron-deficiency anemia is anemia caused by a lack of iron.  Iron deficiency anemia occurs when there is a decrease in total iron body content, severe enough to diminish erythropoiesis and cause anemia.  It is the most common cause of anemia worldwide. 2/13/2023 28
  • 37. CLINICAL EVALUATION  Dietary history: intake of milk, weaning foods and supplements.  Pica increases the risk of infestations and lead poisoning.  Common features of anemia are present.  Behavioral symptoms: irritability and anorexia, precede weakness, fatigue, leg cramps, breathlessness and tachycardia.  Congestive heart failure and splenomegaly may occur with severe, persistent, untreated iron deficiency. 2/13/2023 37
  • 39. TREATMENT  The cause of anemia should be identified and corrected.  Hookworm infestation is the commonest cause of occult gastrointestinal blood loss in rural India at all ages.  Close follow-up is required to assess for adequate response and correction of anemia, this will help to identify iron therapy failure. 2/13/2023 39
  • 40. DIETARY COUNSELING AND TREATMENT 2/13/2023 40
  • 41. ORAL IRON PREPARATIONS  Should be taken on an empty stomach or in between meals for best absorption.  The most cost- effective oral preparation is ferrous sulfate. 2/13/2023 41
  • 42. TREATMENT  The dose for treatment of anemia is 3-6 mg/kg/day elemental iron.  The reticulocyte count increases within 72-96 hours after initiating therapy.  After correction of anemia, oral iron should be continued for 4-6 months to replenish iron stores. 2/13/2023 42
  • 43. TREATMENT  As iron deficiency anemia is readily corrected with medication, blood transfusions should be avoided in young, stable patients.  Red cell transfusions are needed in emergency situations, as in patients where the rate of blood loss exceeds the expected rise of hemoglobin, for urgent surgery, hemorrhage or severe anemia with congestive cardiac failure.  In very severe anemia with congestive cardiac failure, transfusions must be given very slowly (2-3 ml/kg) with monitoring and diuretic therapy if necessary. 2/13/2023 43
  • 44. MEGALOBLASTIC ANEMIA  Megaloblastic anemia is a distinct type of anemia characterized by macrocytic red blood cells and erythroid precursors, which show nuclear dysmaturity.  It impaired DNA synthesis that results in enlarged red blood cells.  The incidence varies with dietary practices and socioeconomic patterns.  A study has estimated the incidence of folate deficiency as 6.8%, vitamin B12 as 32% and combined deficiency as 20% in north Indian children. 2/13/2023 44
  • 48. ABSORPTION OF VIT B12 2/13/2023 48
  • 49. ETIOLOGY Folic acid deficiency  Folate deficiency can be caused by decreased ingestion, impaired absorption impaired utilization and increased requirement. 2/13/2023 49
  • 51. CLINICAL MANIFESTATIONS  Anemia, anorexia, irritability and easy fatigability.  Patients should be examined for signs of thrombocytopenia and neutropenia.  Features characteristically found in megaloblastic anemia include glossitis, stomatitis and hyperpigmentation of the skin on knuckles and terminal phalanges, enlargement of liver and spleen (30-40% cases). 2/13/2023 51
  • 52. CLINICAL MANIFESTATIONS  Petechiae and hemorrhagic manifestations have been reported in 25% cases.  Pancytopenia.  A neurologic examination is mandatory, it may reveal loss of position and vibratory sensation, memory loss, confusion and neuropsychiatric symptoms can occur. 2/13/2023 52
  • 53. LABORATORY EVALUATION  The reticulocyte count should be performed; if available, serum B 12 and folate levels are assayed.  The Schilling test, (to determine absorption of vitamin B-12) which requires radioactive labeled B12, is used to identify pernicious anemia and for evaluation of deficiency states. 2/13/2023 53
  • 54. LABORATORY EVALUATION  Bone marrow evaluation should be performed in any child with more than one abnormal hematological cell line.  Serum chemistry may reveal elevated lactic dehydrogenase (LDH) and bilirubin. 2/13/2023 54
  • 56. DIFFERENTIAL DIAGNOSIS  Other causes of macrocytosis should be considered in the differential diagnosis of megaloblastic anemia.  These causes include aplastic anemia and marrow failure syndromes, congenital dyserythropoietic anemia, chronic liver disease, hypothyroidism, neoplastic and HIV infections. 2/13/2023 56
  • 57. TREATMENT  Treatment depends on the underlying cause.  If the cause is not identified, therapeutic doses of folate (1-5 mg/ day) and vitamin B12 (1000 µg) are administered.  Only folate therapy may correct the anemia, but will not correct cobalamin deficiency-associated neurological disorder and result in the progression of neuropsychiatric complications.  Folate deficiency due to dietary insufficiency or increased demands is best treated with folate supplements. 2/13/2023 57
  • 58. TREATMENT  Folate deficiency due to use of anti-folate medications (proguanil, pyrimethamine and trimethoprim) is managed by reducing or eliminating the implicating agent and supplementation with folic acid.  Folate is available as 5 mg tablet and overdose is not associated with any adverse effects; a dose of 1-5 mg/day is recommended for 3-4 weeks. 2/13/2023 58
  • 59. TREATMENT  Parenteral vitamin B12 at a dose of 1 mg (1000 µg) is given intramuscularly; lower doses (250 µg) can be used in infants.  A decrease in MCV, reticulocytosis and higher platelet and neutrophil counts is observed within a few days of therapy.  In patients with pernicious anemia and malabsorptive states, vitamin B12 (1000 µg) should be given IM daily for 2 weeks, then weekly until the hematocrit value Is normal and then monthly for life. 2/13/2023 59
  • 60. TREATMENT  Patients with neurological complications should receive 1000 µg IM every day for 2 weeks, then every 2 weeks for 6 months and monthly for life.  Oral supplements can be administered; however, absorption is variable and may be insufficient in some patients.  In dietary insufficiency, no standard duration of therapy has been defined. Dietary counseling is advised, along with vitamin B12 supplements (oral daily or parenteral dose every 3-12 months). 2/13/2023 60
  • 61. SOURCE OF VIT B12 AND FOLIC ACID 2/13/2023 61
  • 62. HEMOLYTIC ANEMIA  The term 'hemolytic anemia' is limited to conditions in which rate of red cell destruction is accelerated and ability of the bone marrow to respond to the anemia is unimpaired.  Under maximal stimulation, the normal marrow is capable of increasing its production about 6-8 times its basal level.  The reticulocyte count is useful in determining the rate of red cell destruction.  The normal reticulocyte count value in the newborn is 3.2+1.4% and in children 1.2+0.7%. 2/13/2023 62
  • 65. CLINICAL FEATURES  In rapidly occurring hemolysis, the symptoms are more numerous and pronounced.  Evidence of anemia: weakness, pallor, fatigue may be seen.  jaundice is a prominent finding and red urine occurs in intravascular hemolysis. 2/13/2023 65
  • 66. CLINICAL FEATURES  Splenomegaly is seen in auto immune and many congenital forms of hemolytic anemia.  The presence of gallstones and icterus (hereditary spherocytosis), hemolytic / thalassemic facies (thalassemia major, intermedia), leg ulcers (sickle cell disease) can help lead investigations, confirmatory tests are still required. 2/13/2023 66
  • 67. LABORATORY MANIFESTATIONS  The Coombs test is the most important initially test to perform to define the etiology of hemolysis.  A direct antiglobin (direct Coombs) test is positive in most cases of immune hemolytic anemia.  The level of indirect bilirubin provides evidence for hemolysis, it is relatively insensitive and is elevated only if the liver function is impaired or when hemolysis is extensive. 2/13/2023 67
  • 68. MANAGEMENT  In an acute attack of hemolysis, it is important to maintain fluid balance and renal output.  Shock is managed by standard measures.  Blood transfusions.  Even with careful blood matching, destruction of transfused blood with increased burden on excretory organs and risk of thromboses may occur. 2/13/2023 68
  • 69. MANAGEMENT  Acute autoimmune hemolytic anemia is treated with steroids (prednisone 1-2 mg/kg/day), gradually tapered over several months, once the patient shows resolution of hemolysis.  In chronic hemolysis, the etiology needs to be investigated and treated accordingly. 2/13/2023 69
  • 70. THALASSEMIA  Thalassemia is a Greek term derived from thalassa, which means "the sea" (Mediterranean Sea) and emia, which means "related to blood".  It occurs due to globin gene defects, one of the commonest monogenic diseases.  Molecular biology and genetics of thalassemia syndromes have revealed more than 200 mutations, across populations from Southeast Asia to Africa. 2/13/2023 70
  • 71. THALASSEMIA  Carrier rates for thalassemia reported in North Indians, varies in different ethnic groups from 3-17%.  The major hemoglobin in children after 1 year of age, HbA constitutes approximately 90%, and a minor component, HbA2 accounts for 23%.  The main hemoglobin in fetal life is HbF of which only traces remain after 1 year of life. 2/13/2023 71
  • 72. PATHOPHYSIOLOGY  Thalassemia are inherited disorders of hemoglobin synthesis that result from alteration in the rate of globin chain production.  A decrease in the rate of production of a globin (alpha, beta, gamma, delta) impedes hemoglobin synthesis and creates an imbalance with normally produced globin chains. 2/13/2023 72
  • 74. TYPES 1. Beta thalassemia 2. Alpha thalassemia 2/13/2023 74
  • 77. BETA THALASSEMIA 2/13/2023 77 - Deficiency of beta globin leads to free alpha globin. - Cause hemolysis in bone marrow and spleen. - Hemolysis causes Hb to enter in blood, heme= iron + bilirubin (hemochromatosis+ Jaundice)
  • 79. PRESENTATION  hypochromic, microcytic anemia that does not respond to iron supplementation.  Thalassemia minor are usually asymptomatic.  Children with thalassemia major usually demonstrate no symptoms until about months of age 2/13/2023 79
  • 82. SPECTRUM OF B THALASSEMIA Thalassemia major: The condition is characterized by transfusion dependent anemia, splenomegaly, bony deformities, growth retardation and hemolytic facies in untreated or inadequately treated individuals.  Blood smear shows hypochromia, microcytosis, fragmented and nucleated red cells, polychromasia and occasionally immature leukocytes.  Organomegaly is reduced in well-transfused patients 2/13/2023 82
  • 85. PREVENTION AND MANAGEMENT  Genetic counseling: is needed for the couple and their family to prevent the birth of other children with thalassemia major.  Prenatal testing is available to ensure the second child of the afflicted family does not have thalassemia major. 2/13/2023 85
  • 87. MANAGEMENT  Blood transfusion should be initiated at an early age when the child is asymptomatic and attempts should be made to keep pretransfusion hemoglobin level at 9-10 g/dL (to promote growth and prevent deformities).  A normal diet is recommended, with the following supplements: Folic acid, small doses of ascorbic acid (vitamin C), and alpha-tocopherol (vitamin E). 2/13/2023 87
  • 88. MANAGEMENT Blood Transfusions and Infections  After multiple transfusions, patients often develop transfusion reactions or alloimmunization to red cell antigens. These complications can be minimized by using leukocyte filters during transfusion or having blood banks prepare leuko-poor packed red cells.  Administration of acetaminophen and diphenhydramine hydrochloride before transfusion(s) minimizes febrile or allergic reactions. 2/13/2023 88
  • 90. BLOOD TRANSFUSIONS AND INFECTIONS  The major complications are those related to transmission of blood-borne viral infections.  Hepatitis B vaccination and regular assessment of hepatitis C and HIV status are part of routine care.  Folate supplements are required; ferritin levels are used to monitor iron overload. 2/13/2023 90
  • 91. IRON OVERLOAD  Iron overload is a major cause of morbidity.  The excessive load of iron is due to increased gastrointestinal iron absorption as well as repeated transfusions.  Patients show signs of endocrinopathy affecting pancreas, thyroid and parathyroid glands, decreased growth and lack of sexual maturation. 2/13/2023 91
  • 92. CHELATION THERAPY  The introduction of chelating agents capable of removing excess iron from the body has dramatically increased life expectancy.  The cost, however, has resulted in poor compliance and inadequate dosing of iron chelators in many patients.  Combination therapy may be needed in children not adequately controlled by appropriate use on a single iron chelator. 2/13/2023 92
  • 93. CHELATION THERAPY  Deferoxamine (DFO) is administered by subcutaneous infusion pump (40-60 mg/kg/ day over 8-12 hours for 5-6 days/week).  Higher doses of DFO may be administered IV when serious iron overload such as cardiac failure occurs.  Eye examinations, hearing tests and renal function tests are required to monitor the effects of DFO therapy. 2/13/2023 93
  • 94. CHELATION THERAPY  Deferasirox is an oral chelating agent, which binds iron with high affinity and is excreted in bile and via the feces. The dose is 30 mg/kg dissolved in water and taken daily.  Deferiprone is an oral chelating agent, which is less effective than DFO in preventing organ damage. It is administered at a dose of 75 mg/ day, but should be given under supervision for side effects including arthritis, neutropenia and agranulocytosis. 2/13/2023 94
  • 95. SPLENECTOMY  The spleen acts as a store for nontoxic iron, protecting the body from extra iron thus early removal of the spleen may be harmful.  Splenectomy is justified only in hypersplenism, leading to excessive destruction of erythrocytes and thus increasing the need for frequent blood transfusions, resulting in further iron accumulation.  Patients who require more than 200-250 mL/ kg of packed red blood cells per year to maintain hemoglobin may benefit from this procedure. 2/13/2023 95
  • 96. SPLENECTOMY  Pre-splenectomy immunizations and prophylactic antibiotics have significantly decreased infections in splenectomized children.  The procedure is delayed until the child is aged 5 years old. This is rarely required in children receiving adequate transfusion therapy. 2/13/2023 96
  • 98. ALPHA THALASSEMIA  Alpha-thalassemia: is a form of thalassemia involving the genes HBA1 and HBA2.  Alpha-thalassemias are most commonly inherited in a Mendelian recessive manner.  They are also associated with deletions of chromosome 16p. 2/13/2023 98
  • 105. ERYTHROBLASTOSIS FETALIS/ HYDROPS FETALIS 2/13/2023 105 - life-threatening condition in which a fetus or newborn has an abnormal buildup of fluids in the tissue around the lungs, heart, or abdomen, or under the skin. - 1 out of every 1,000 births.
  • 110. COMPLICATIONS  Bone problems: "hair on end" appearance of the skull, prominence of the upper incisors.  These changes contribute to the classic hemolytic/ chipmunk facies.  Osteoporosis and osteopenia may result in fractures; the child may need treatment with calcium, vitamin D and bisphosphonates to improve bone density. 2/13/2023 110
  • 111. OTHER COMPLICATIONS  Extramedullary hematopoiesis: This usually occurs in patients with thalassemia intermedia who are not receiving transfusion therapy.  They may cause neuropathy or paralysis from compression of the spine or peripheral nerves.  Compression fractures and paravertebral expansion of extramedullary masses, which behave like tumors, are seen during the second decade of life. 2/13/2023 111
  • 112. OTHER COMPLICATIONS  Psychosocial: as these children survive into adulthood, problems related to employment, marriage and having families, as well as the stress of chronic illness will need to be addressed. 2/13/2023 112
  • 113. CURE OF THALASSEMIA MAJOR  Hematopoietic stem cell transplantation (HSCT) Is the only known curative treatment for thalassemia.  Poor outcome of HSCT occurs in patient with hepatomegaly, portal fibrosis and inadequate chelation prior to transplant.  The event-free survival rate for patients who have all three features is 59%, compared to 90% for those who do not. 2/13/2023 113
  • 115. HEMATOPOIETIC STEM CELL TRANSPLANTATION  Bone marrow transplantation (BMT) is more correctly called hematopoietic stem cell transplantation (HSCI).  This is an established life-saving procedure for a number of malignant and non-malignant diseases.  Types: (1) Autologous transplant-when the source of stem cells is harvested from the patient and (2) Allogenek transplant-when stem cells are collected from a human leukocyte antigen (HLA) matched sibling or unrelated donor. The commonly used sources of hematopoietic stem cells are cytokine mobilized peripheral blood, bone marrow and umbilical cord blood. 2/13/2023 115
  • 116. SICKLE CELLANEMIA  Occurs in India with a gene frequency of 4.3%, is relatively common in multiple states including Odisha, Maharashtra, Madhya Pradesh, Jharkhand and Gujarat. 2/13/2023 116
  • 117. PREVALENCE  The Ministry of Health estimates that 2,000 Tharu people have sickle cell anemia throughout the country, with heavy prevalence in the midwestern and farwestern regions of the nation, where more than 1,300 people have been diagnosed since 2011. According to the 2011 census, there are 1.74 million Tharus in Nepal. 2/13/2023 117
  • 120. PATHOPHYSIOLOGY Sickle cell anemia, an autosomal recessive disease, results from the substitution of valine for glutamic acid at position 6 of the beta-globin gene. 2/13/2023 120
  • 121. PATHOPHYSIOLOGY  Sickle red cells obstruct the microcirculation, resulting in tissue hypoxia that perpetuates sickling.  The affected cells are rapidly hemolyzed and have a lifespan of app 10-20 days. 2/13/2023 121
  • 126. TYPES OF CRISIS i. Vaso-occlusive crisis - this crisis occurs when the microcirculation is obstructed by sickled red cells, resulting in ischemic injury. - Pain is the chief complaint; bones (e.g. femur, tibia and lower vertebrae) are frequently involved. - Vaso-occlusion may present as dactylitis or as hand and foot syndrome (painful swollen hands and/ or feet in children). - Vaso-occlusion may mimic an acute abdomen. The spleen develops auto infarcts and becomes fibrotic. 2/13/2023 126
  • 127. VASO-OCCLUSIVE CRISIS  In the kidney, it results in papillary necrosis, which results in papillary necrosis, which results in isosthenuria (inability to concentrate urine).  Vaso-occlusive crisis can involve the lungs and cause acute chest syndrome; retinal hemorrhages in the eye and involvement of corpus cavernosum, leading to priapism.  Involvement of the femoral head results in avascular necrosis.  Cerebrovascular accidents may occur in children, and trend to be recurrent. 2/13/2023 127
  • 128. TYPES OF CRISIS ii. Acute chest syndrome: this is a vaso-occlusive crisis, with chest pain, cough, tachypnea, dyspnea, hypoxemia and fever. The condition requires hospitalization with need for IV fluids, oxygen, bronchodilators and antibiotics (including for Mycoplasma and Chlamydia). iii. Sequestration crisis: sickle cells block splenic outflow and pooling of blood in the engorged spleen, resulting in splenic sequestration. 2/13/2023 128
  • 129. TYPES OF CRISIS iv. Risk of infection: Patients are susceptible to infection with encapsulated organisms (H. influenzae, S. pneumoniae) and other microbes (Salmonella, Mycoplasma, S. aureus, E. colz). iv. Aplastic crisis: Aplastic crisis occurs when the bone marrow stops producing red blood cells, following an infection (often parvovirus B19) or associated with folate deficiency. The condition is self-limited; supportive care and packed red cell transfusions are required. 2/13/2023 129
  • 130. LABORATORY STUDIES  Anemia and thrombocytosis are commonly found.  While Leukocytosis is common, white cell count >20000/mm3 with a shift to the left indicates infection.  On peripheral smear, sickle-shaped red cells are found along with target cells.  Presence of Howell-Jolly bodies indicates functional asplenia.  The indirect bilirubin level may be elevated 2/13/2023 130
  • 131. LABORATORY STUDIES  If the diagnosis of sickle cell anemia has not been made, the sickling test establishes the presence of HbS.  Hemoglobin electrophoresis 2/13/2023 131
  • 132. ASSESSMENT DURING ACUTE ILLNESS  In a sick child, blood type and crossmatch is required for probable transfusion.  X-ray of the chest and bones, and blood culture may be indicated.  Monitoring of oxygen saturation and arterial blood gases should be advised in patients in respiratory distress.  A drop in hemoglobin exceeding 2 g/ dL from baseline indicates splenic sequestration or aplastic crisis; the reticulocyte count and examination of spleen size help differentiate these conditions.  An electrocardiogram is performed, if patient has chest pain and/ or irregular pulse. 2/13/2023 132
  • 133. HOSPITAL MANAGEMENT  Hydration and analgesia are the mainstays of treatment in pain crisis.  Oral hydration is preferred, if the patient is not vomiting and can tolerate oral fluids.  Narcotic analgesia is frequently used.  Patients with severe dehydration should receive IV fluids.  Blood transfusion is required in patients with aplastic and sequestration crisis. 2/13/2023 133
  • 134. HOSPITAL MANAGEMENT  Intubation and mechanical ventilation, exchange transfusion may be required, if cerebrovascular accidents have occurred, or with acute chest syndrome.  Exchange transfusion consists of replacing the patient red cells by normal red cells, decreasing sickle hemoglobin (HbS).  Bone marrow transplant. 2/13/2023 134
  • 135. FACILITIES IN NEPAL  Bipanna Nagarik Kosh was started after the Janandolan of 2062 BS. With the country slowly recovering from the decade long armed conflict, this Koshi was established to provide some financial relief to people from difficult and expensive diseases. Cardiovascular diseases, Cancer, Renal failure, Alzheimer's disease, Parkinson's disease, Head and Spinal injury, Sickle Cell Anaemia and Stroke are covered under this program. 2/13/2023 135
  • 136. FACILITIES IN NEPAL  Those eligible to claim services under the Bipanna Nagarik Koshi will receive the following: 1. Each patient will be provided NRs. 1,00,000/- as health care expense including medicines required for disease management 2. For patients with renal impairment (मृगौला रोगीको उपचार सम्बन्धमा) 3. Free haemodialysis and peritoneal dialysis for 1 year 4. NRs. 2,00,000/- as kidney transplant expense 5. NRs. 1,00,000/- in one or more instalments as medicine expense for post-transplant management 6. NRs. 1,00,000 to purchase medicine post kidney transplant is provided as cash grant. All other subsidies are provided directly through hospitals in Nepal. 2/13/2023 136
  • 137. FACILITIES IN NEPAL IN LISTED HOSPITAL FOR SCD 1. Bheri Zonal Hosppital, Banke 2. Lumbini Zonal hospital, Butwal 3. Seti Zonal Hospital, Kailali 4. Mahakali Zonal Hospital, Kanchanpur Mahakali 5. District Hospital, Kapilbasthu 6. District Hospital, Nawalparashi 7. District Hospital, Bardiya 2/13/2023 137
  • 138. PREVENTIVE CARE  All children require prophylaxis with penicillin/ amoxicillin, at least until 5 years of age.  They should receive the pneumococcal, meningococcal and Hemophilus vaccines.  They should also receive lifelong folate supplements.  Hydroxyurea, that increases HbF and reduces episodes of pain crises, stroke and acute chest syndrome, is recommended to be given at a daily dose of 10-15 mg/kg/day.  Children on hydroxyurea should be monitored with complete blood counts. Patients need to be screened for gallstones and stroke.  Genetic counseling and testing should be offered to the family. Parents need to learn to identify complications. 2/13/2023 138
  • 139. APLASTIC ANEMIA  Aplastic anemia is a group of inherited or acquired disorders of the hematopoietic stem cells.  The prevalence of bone marrow failure resulting from hypoplastic or aplastic anemia is 2-6 cases per million in Western literature.  In India, the prevalence is higher. 2/13/2023 139
  • 146. TREATMENT  Supportive care such as packed red cells for anemia, platelets for thrombocytopenia and antibiotics for infection is needed.  Hematopoietic stem cell transplant (HSCT) is the only curative therapy.  Criteria for referral for HSCT is: (i) patients who are young (<50 years) (ii) severe aplastic anemia, and (iii) a matched related sibling donor. Patients with severe acquired aplastic anemia who cannot undergo HSCT may benefit from therapy with antithymocyte globulin (ATG) or anti-lymphocyte globulin (ALG) and cyclosporine. 2/13/2023 146
  • 147. TREATMENT  Anti-thymocyte globulin (ATG) is an infusion of horse or rabbit-derived antibodies against human T cells, which is used in the prevention and treatment of acute rejection in organ transplantation and therapy of aplastic anemia.  Anti-lymphocyte globulin (ALG) is an infusion of animal- antibodies against human T cells which is used in the treatment of acute rejection in organ transplantation. 2/13/2023 147
  • 148. PROGNOSIS  Severe anemia can result in high-output cardiac failure/ neutropenia can lead to bacterial and fungal infections; severe bleeding can occur due to thrombocytopenia.  The severity and extent of cytopenia determine prognosis.  With current HSCT regimens, most patients with severe aplastic anemia show 60- 70% long-term survival; better survival is reported in favorable subgroups. 2/13/2023 148
  • 150. REFERENCES  Ghai O, Paul V, Bagga A. Essential Pediatrics. 7th ed. CBS Publisher & Distributers; 2008. 2/13/2023 150

Editor's Notes

  1. Lassitude: a state of physical or mental weariness; lack of energy.
  2. A cardiac or vascular murmur heard in anemic persons who have no valvular lesion.
  3. Bruit, also called vascular murmur, is the abnormal sound generated by turbulent flow of blood in an artery due to either an area of partial obstruction or a localized high rate of blood flow through an unobstructed artery. Humming: make a low, steady continuous sound like that of a bee
  4. The main hematinics are iron, B12, and folate. Deficiency in hematinics can lead to anaemia.
  5. Spherocytosis is the presence in the blood of spherocytes, i.e erythrocytes (red blood cells) that are sphere-shaped rather than bi-concave disk shaped as normal.
  6.  It's the average amount in each of your red blood cells of a protein called hemoglobin, which carries oxygen around your body.
  7. Abnormal red cell indices can exist in subjects even when the underlying disorder is not sufficiently severe to cause anemia.
  8. Polychromasia is the presentation of multicolored red blood cells in a blood smear test.
  9. The direct Coombs test is used to test for autoimmune hemolytic anemia—that is, a condition where the immune system breaks down red blood cells, leading to anemia.
  10. Reticulocytes are immature red blood cells. 
  11. is the process which produces red blood cells (erythrocytes), which is the development from erythropoietic stem cell to mature red blood cell.
  12. Narrowing of oesophagus Iron absorption is reduced in the presence of non-nutritive substances. Iron therapy usually cures the pica behavior. There are different forms of pica, one caused directly by iron deficiency probably due to the lack of iron in some areas of the brain and one more culturally driven and including mostly geophagy.
  13. The peripheral smear shows that red cells are microcytic and hypochromic, with anisocytosis, poikilocytosis and increased red cell distribution width (RDW). The MCV and MCHC are reduced. Red cell number is reduced, unlike in thalassemia where it is increased. Serum iron is reduced, total iron binding capacity (TIBC) is increased and transferrin is reduced to less than 16% {normal 25-50%). The reduction in serum ferritin occurs early, and correlates with total body iron stores. Ferritin, an acute phase reactant, is elevated in inflammatory conditions, and may thus be falsely high in a sick child.
  14. Enteric-coated preparations have fewer side effects, but are also less efficacious and more expensive.
  15. Generally, 50-65 mg of elemental iron, given three to four times per day, for a total of 200-300 mg of iron is needed for replacement therapy. 
  16. Immature cells
  17. One carbon reaction: mediated by the folate co factor, is a group of biochemical reactions with a special set of enzymes and co-enzymes. (e.g. celiac. disease, malabsorption states) (e.g. methotrexate, 6-mercapptopurine, trimethoprim, azathioprine, phenytoin), (e.g. infancy, hyperthyroidism, chronic hemolytic disease). In infants, it is related to maternal deficiency with inadequate body stores and prolonged exclusive breastfeeding (breast milk is a poor source of vitamin B12 and associated with reduced access to other foods). Giardia infection is shown to cause folate malabsorption. H. pylori infections are implicated in vitamin B12 malabsorption in adults. Rarely inherited metabolic disorders may cause megaloblastic anemia.
  18. History of medication intake, medical disorders and infestation needs to be taken.
  19. All 3 blood cells decrease (WBC, RBC, Platelets) Loss of movement/ body position
  20. Cytopenia is a reduction in the number of mature blood cells. It is common in cancer patients being treated with radiation and/or chemotherapy. The Schilling test is a medical procedure used to determine whether you're absorbing vitamin B-12 properly. 
  21. In megaloblastic anemia the bone marrow will be cellular and show, red blood cell precursor nuclear-cytoplasmic asynchrony. Granulocyte precursors may also be abnormal.
  22. (pure red cell aplasia, transient erythroblastopenia of childhood), (e.g. myelodysplastic syndromes)
  23. myeloid progenitor
  24. March hemoglobinuria is a condition in which physical exertion in the upright position gives rit:ie to the passage of red urine containing hemoglobin in solution. Abetalipoproteinemia is an inherited disorder that impairs the normal absorption of fats and certain vitamins from the diet. Porphyria is a group of liver disorders in which substances called porphyrins build up in the body, negatively affecting the skin or nervous system.  Hypersplenism is an overactive spleen
  25. Because the reticulocyte count is expressed as a percentage of total RBCs, it must be corrected according to the extent of anemia with the following formula: reticulocyte % × (patient Hct/normal Hct) = corrected reticulocyte count. and implies that the erythrocyte is coated with IgG or C3 component of complement. However the test may be negative in 2-5% of patients with immune hemolysis.
  26. (when chains are needed to pair with chains to form HbA, after chains production is turned off). The condition may not be recognized because of the delay in cessation of HbF production till 3-5 years of age in some cases.
  27. Polychromasia is the presentation of multicolored red blood cells in a blood smear test. , but is marked in patients receiving irregular or adequate transfusion support.
  28. Target cells, or codocytes, have an excess of cell membrane relative to cell volume In thalassemia major and intermedia, the hemoglobin level ranges from 2-8 g/ dL; MCV and MCH are significantly low. Reticulocyte count is elevated to 5-8% and leukocytosis is usually present. The platelet count is usually normal, unless the spleen is markedly enlarged and causing hypersplenism. Peripheral blood film reveals hypochromia and microcytosis.
  29. Hemochromatosis is a disorder where too much iron builds up in your body. Sometimes it's called “iron overload.”
  30. Iron preparations as hematinic or dietary supplements should not be given. Drinking tea with meals has been shown to decrease absorption of iron in the gut
  31. Very high transferrin saturation in patients with iron overload affects the bacteriostatic properties of the protein, resulting in increased risk of infections with Y. enterocolitica that presents with fever and diarrhea. Other important infections which may occur are mucormycosis and Listeria monocytogenes.
  32. Other investigations include liver biopsy, liver MRI and echocardiography. An accurate and noninvasive tool to assess cardiac iron status is cardiac T2 * magnetic resonance (CMR).
  33. This chelator is highly selective for iron and chelates both intracellular and extracellular excess iron.
  34. .
  35. 1,. One missing or abnormal gene makes a child a silent alpha thalassemia carrier. Silent alpha thalassemia carriers have no signs or symptoms of the disease, but are able to pass thalassemia on to their children 2. Two missing or mutated genes is a condition called alpha thalassemia minor or having alpha thalassemia trait. Children with this condition may have red blood cells that are smaller than normal (microcytosis) and sometimes very slight anemia. People with alpha thalassemia minor usually don't have any symptoms at all, but can pass thalassemia on to their children. The two abnormal genes can be on the same chromosome (called the cis position) or one on each chromosome (called the trans position). If two genes on the same chromosome are affected, the person can pass along a two-gene defect to his or her child. This situation is much more common in people of Asian descent.
  36. 3. Three missing or mutated genes is called hemoglobin H disease. Signs and symptoms will be moderate to severe.
  37. 4. Four missing or mutated genes is a condition known as alpha thalassemia major or hydrops fetalis. This almost always leads to a fetus dying before delivery or a newborn baby dying shortly after birth. However if this disease is suspected because of a history in the family, it can be diagnosed prenatally. Sometimes, if treatment is initiated before the baby is even born, the baby can survive.
  38. severe anemias, including thalassemia fetal bleeding (hemorrhage) heart or lung defects in the baby genetic and metabolic disorders, including Turner syndrome and Gaucher’s disease viral and bacterial infections, such as Chagas disease, parvovirus B19, cytomegalovirus (CMV), toxoplasmosis, syphilis, and herpes vascular malformations tumors
  39. Extramedullary hematopoiesis (EH) is defined as hematopoiesis occurring in organs outside of the bone marrow; it occurs in diverse conditions, including fetal development, normal immune responses, and pathological circumstances.
  40. The main difference between a stem cell and bone marrow transplant is whether stem cells are collected from the bloodstream or bone marrow. A stem cell transplant uses stem cells from your bloodstream, or a donor’s bloodstream. This is also called a peripheral blood stem cell transplant. A bone marrow transplant uses stem cells from your bone marrow, or a donor’s bone marrow. Stem cell transplants are the most common type of transplant. Bone marrow transplants are not used as much.  This is because: it’s easier to collect stem cells from the bloodstream than bone marrow your treatment team can usually collect more cells from the bloodstream blood counts tend to recover quicker following a stem cell transplant
  41. HBB: beta globin gene
  42. SC Trait : NO chance of getting malaria (plasmodium falciparium. Malarial parasites invade normal red blood cells and rearrange their content. The parasites breed and produce proteins that make red blood cells sticky. These blood cells explode, releasing parasites capable of infecting other red blood cells. The misshapen hemoglobin of SCT affects a parasite’s ability to complete this cycle. The parasite triggers the SCT hemoglobin to sickle. The immune system then clears the infected red blood cells before the parasite can complete its life cycle and infect other red blood cells. This means fewer parasites and milder illness
  43. make (something) continue indefinitely
  44. papillary necrosis is a form of nephropathy involving the necrosis of the renal papilla. Corpus cavernosum: either of two masses of erectile tissue forming the bulk of the penis and the clitoris. The two corpora cavernosa and corpus spongiosum (also known as the corpus cavernosum urethrae in older texts and in the adjacent diagram) are three expandable erectile tissues along the length of the penis, which fill with blood during penile erection. 
  45. Asplenia refers to the absence of normal spleen function and is associated with some serious infection risks. Hyposplenism is used to describe reduced ('hypo-') splenic functioning, but not as severely affected as with asplenism. Target cell: abnormal RBC
  46. Sickle hemoglobin differentiates individuals who are homozygous from the heterozygous. The former will have high levels of HbSS (80-90%); carriers have lower levels (35-40%). These samples should be taken before blood transfusion.
  47. Hypoxia Dehydration acidosis
  48. Plastic: formation and synthesis
  49. Failure of bone marrow stem cells
  50. Myeloid dysplastic Syndrome: MDS = MCV high Precursor cell high, when bone marrow is functioning, those precursor cell increases but does not get matured. Thus MCV is high.
  51. Cytopenia is a reduction in the number of mature blood cells.