1. The document discusses various types of anemia classified based on their pathogenesis: decreased red blood cell production (e.g. iron deficiency, megaloblastic), increased red blood cell destruction (e.g. hemolytic anemias like hereditary spherocytosis, G6PD deficiency), and congenital red blood cell defects (e.g. membrane defects, hemoglobin disorders like sickle cell anemia and thalassemia). 2. Hereditary spherocytosis is described as a congenital hemolytic anemia caused by a red blood cell membrane defect from spectrin deficiency, leading to chronic hemolysis and splenomegaly. 3. Sickle cell anemia

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Learn…ignorance will disappear of itself…!

2. ….. foundation of clinical medicine
Shashidhar Venkatesh Murthy
A/Prof & Head of Pathology
College of Medicine & Dentistry
Clinical Pathology:
RBC 1.4: Congenital Hemolytic Anemia
CPC : Term2 Week1 - Haem 1/2.
System : Haematology - RBC Disorders.
Topic : 1: Anemia Intro 2: IDA, MBA & ACD 3: Acquired HA 4: Congenital HA. 5: Others.

3. Pathogenetic Classification of Anemia:
 Decreased Production:
 Nutrient Deficiency.
 Iron def (IDA) / Megaloblastic (MBA)
 Hemopoietic cell defect:
 Anemia of chronic disorders (ACD)
 Aplastic anemia (AA).
 Dysplastic anemia. Myelodysplastic Syndromes
 Increased loss / destruction:
 Blood loss anemia – Acute / Chronic - bleeding.
 Hemolytic anemia – Congenital / Acquired.
 Acquired / External injury.
 Immune AIHA (Warm/Cold) Mechanical, Drugs & Parasites
 Congenital / Internal RBC defect
 Defective Membrane: Hereditary Spherocytosis.
 Defective Hemoglobin: Sickle & Thalassemia
 Deficient Enzyme: G6PD deficiency anemia.
3
3
•Cell Mem
•Hb.
•Enzymes

4. Hereditary Spherocytosis: Spectrin deficiency*
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1. Chronic hemolytic anemia (from birth or late)
2. Plenty of spherocytes. (more than in WAHA)
3. Massive splenomegaly.
4. Cholecystitis and cholelithiasis
5. Aplastic, megaloblastic or hemolytic crisis
(Comb’s test negative)

5. Hereditary Spherocytosis:
5
Normal spleen
size of a fist…!
Splenectomy: Therapy for severe HS

6. G6PD Deficiency: Oxidative hemolysis
1. G6PD deficiency.
2. Oxidative damage (old RBC)
3. Heinz bodies (globins)
4. Bite & blister cells (dry RBC*)
5. Episodic Hemolysis.
6. Splenomegaly, gall stones..
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7. "Thinking should become your
capital asset, no matter whatever
ups and downs come across in
your life.
― Dr. APJ Abdul Kalam, Former President of India..

8. Hemoglobin Disorders:
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Physiologic
anemia –
change from Hb
F to Hb A.
Hb A α2β2 - 97%
Hb A2 α2δ2 - 2.5%
Hb F α2γ2 - <1%
HbF HbA
Hb F - α2γ2- 75%
Hb A - α2β2 25%
Congenital Hb. disorders: Globin chain*
• Qualitative: Hemoglobinopathy eg. Sickle
• Quantitative: Thalassemia syndromes.

9. Hb Electrophoresis:
9
-
Patient 
Hb-S
Hb-F
Hb-A
Hb Barts
(β4)
+
ControlA B C D
αThal
Normal
αThal+
Sickle.
Sickle
New born Screening

10. Thalassemia
Pathologenesis
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• Heinz bodies.
• Basophilic stippling.
 Normal Hb. - micro/hypo
 Destruction - Hemolysis.
 Marrow Hyperplasia.
 Iron - Hemochromatosis
Trait - Minor - Major

11. Thalassemia:
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 Quantitative - globin deficiency.
 Defective globin chain
synthesis.
 α, β, , , … types.
  normal Hb & Abnormal globin
complexes.
 α thal  α  Hb  excess
β forms abnormal tetramers
(Heinz bodies, basophilic
stippling etc)
 Minor: Normal / mild anemia.
micro hypo, target cells.
 Major: severe Haemolytic
anemia (transfusion dependent)
Minor / Trait
Major / Disease

12. "Thinking should become your
capital asset, no matter whatever
ups and downs come across in your life.
― Dr. APJ Abdul Kalam, Former President of India..

13. Sickle Cell Anemia: Hemoglobinopathy.
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Acute Chest Syndrome

14. Sickle Cell Anemia

15. Sickle Cell
Disease:
Clinical Features:
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1. Anemia
2. Jaundice
3. Gall stones
4. Leg Ulcers
5. Auto-splenectomy.
6. Crisis*
Splenic atrophy – (Auto-infarction)

16. The power of thought is not a
compelling force. It is a building force,
and it is only when used in the latter
sense that desirable results can be
produced.
-- Christian D. Larson

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2. Office Tel: 4781 4566
3. Email: venkatesh.shashidhar@jcu.edu.au
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create better times.
-- Christian D. Larson