The document summarizes the anatomy and physiology of the lymphatic system and discusses pathological features of inflammation and infection. It describes the components of the lymphatic system including lymph, lymph vessels, lymph nodes, and lymphatic tissues. It then discusses the functions of the lymphatic system and pathological conditions like Hodgkin's lymphoma, non-Hodgkin's lymphoma, and Burkitt's lymphoma.
The lymphatic system is a network of tissues and organs that help rid the body of toxins, waste and other unwanted materials. The primary function of the lymphatic system is to transport lymph, a fluid containing infection-fighting white blood cells, throughout the body.
The lymphatic system is part of the immune system. It also maintains fluid balance and plays a role in absorbing fats and fat-soluble nutrients.
The lymphatic or lymph system involves an extensive network of vessels that passes through almost all our tissues to allow for the movement of a fluid called lymph. Lymph circulates through the body in a similar way to blood.
There are about 600 lymph nodes in the body. These nodes swell in response to infection, due to a build-up of lymph fluid, bacteria, or other organisms and immune system cells.
A person with a throat infection, for example, may feel that their "glands" are swollen. Swollen glands can be felt especially under the jaw, in the armpits, or in the groin area. These are, in fact, not glands but lymph nodes.
Lymph is the fluid that flows through the lymphatic system, a system composed of lymph vessels (channels) and intervening lymph nodes whose function, like the venous system, is to return fluid from the tissues to the central circulation.
The lymphatic system is a network of tissues and organs that help rid the body of toxins, waste and other unwanted materials. The primary function of the lymphatic system is to transport lymph, a fluid containing infection-fighting white blood cells, throughout the body.
The lymphatic system is part of the immune system. It also maintains fluid balance and plays a role in absorbing fats and fat-soluble nutrients.
The lymphatic or lymph system involves an extensive network of vessels that passes through almost all our tissues to allow for the movement of a fluid called lymph. Lymph circulates through the body in a similar way to blood.
There are about 600 lymph nodes in the body. These nodes swell in response to infection, due to a build-up of lymph fluid, bacteria, or other organisms and immune system cells.
A person with a throat infection, for example, may feel that their "glands" are swollen. Swollen glands can be felt especially under the jaw, in the armpits, or in the groin area. These are, in fact, not glands but lymph nodes.
Lymph is the fluid that flows through the lymphatic system, a system composed of lymph vessels (channels) and intervening lymph nodes whose function, like the venous system, is to return fluid from the tissues to the central circulation.
lymphatic system, a subsystem of the circulatory system in the vertebrate body that consists of a complex network of vessels, tissues, and organs. The lymphatic system helps maintain fluid balance in the body by collecting excess fluid and particulate matter from tissues and depositing them in the bloodstream
SENSORY ORGAN: EYES// EYE STRUCTURE// EYE BALLWasim Ak
SENSE ORANS ARE THE SPECIALIZED ORGANS COMPOSED OF NEURONS , WHICH HELPS US TO PERCEIVE AND RESPOND TO OUR SURROUNDINGS .
THERE ARE FIVE SENSE ORGANS –
EYES : SENSE OF SEEING
EARS : SENSE OF HEARING
NOSE :SENSE OF SMELL
TONGUE : SENSE OF TASTE
SKIN : SENSE OF TOUCH, PAIN etc.
THE HUMAN EYES ARE SENSE ORGAN ADAPTED TO ALLOW US VISION BY REACTING TO LIGHT .
OUR PAIRED EYES ARE LOCATED IN SOCKETS OF THE SKULL CALLED ORBITS .
The lymphatic system is responsible for the production, transport and filtration of lymph fluid throughout the body. In addition to its important circulatory functions, the lymphatic system also has important immunological functions
The genitourinary system, or urogenital system, are the organs of the reproductive system and the urinary system. These are grouped together because of their proximity to each other, their common embryological origin and the use of common pathways, like the male urethra.
lymphatic system, a subsystem of the circulatory system in the vertebrate body that consists of a complex network of vessels, tissues, and organs. The lymphatic system helps maintain fluid balance in the body by collecting excess fluid and particulate matter from tissues and depositing them in the bloodstream
SENSORY ORGAN: EYES// EYE STRUCTURE// EYE BALLWasim Ak
SENSE ORANS ARE THE SPECIALIZED ORGANS COMPOSED OF NEURONS , WHICH HELPS US TO PERCEIVE AND RESPOND TO OUR SURROUNDINGS .
THERE ARE FIVE SENSE ORGANS –
EYES : SENSE OF SEEING
EARS : SENSE OF HEARING
NOSE :SENSE OF SMELL
TONGUE : SENSE OF TASTE
SKIN : SENSE OF TOUCH, PAIN etc.
THE HUMAN EYES ARE SENSE ORGAN ADAPTED TO ALLOW US VISION BY REACTING TO LIGHT .
OUR PAIRED EYES ARE LOCATED IN SOCKETS OF THE SKULL CALLED ORBITS .
The lymphatic system is responsible for the production, transport and filtration of lymph fluid throughout the body. In addition to its important circulatory functions, the lymphatic system also has important immunological functions
The genitourinary system, or urogenital system, are the organs of the reproductive system and the urinary system. These are grouped together because of their proximity to each other, their common embryological origin and the use of common pathways, like the male urethra.
Human Anatomy and Physiology - Lymphatic system and body defensesJethro Baltazar
Human Anatomy and Physiology - Lymphatic System and body defenses.
This presentation was made by Jethro Baltazar showing the Lymphatic system, Parts of Lymphatic system, Function of Lymphatic System, The body defenses including the importance of Lymphatic System in defending our body, Disorders of immunity and Developmental Aspects of the Lymphatic System.
Email me at emulsifier1998@gmail.com and jethrobaltazar1998@yahoo.com for more information and permission to download. You can also text me at 09096530340.
• Gross anatomy:
– Components of the lymphatic system: lymphatic plexuses, lymphatics, lymphoid tissue
– Plan of the lymphatic system: Superficial lymphatic vessels, deep lymphatic vessels, lymph nodes, lymph trunks, cysterna chyli, lymph ducts: right lymph duct and thoracic duct.
– Lymphatic drainage of the lower limb
• Superficial inguinal lymph nodes: arrangement and drainage area.
• Deep inguinal lymph nodes: arrangement and drainage area. The popliteal lymph nodes
– Lymphatic drainage of the upper limb
• Superficial and deep lymphatics. Supratrochlear and infraclavicular lymph nodes.
• Axillary lymph nodes: arrangement and drainage area.
– Plan of the lymphatic drainage of the head and neck: deep cervical lymph nodes, inner and outer circle of lymph nodes.
• Deep cervical lymph nodes: location of the upper and lower groups, jugulodigastric node, jugulo-omohyoid, supraclavicular lymph nodes. Drainage area and efferent vessels.
• The outer circle of lymph nodes: submental, submandibular, buccal, mandibular, parotid, mastoid, occipital: location, drainage area and efferent vessels.
• The inner circle of lymph nodes: pretracheal, paratracheal and retropharyndeal.
• The tonsils and Waldeyer’s ring.
– Lymphatic drainage of the thorax:
• Lymph nodes of the chest wall: Parasternal, intercostal, and phrenic
• Lymph nodes of the mediastinum: Nodes around the division of the trachea and the main bronchi, anterior and posterior mediastinal nodes.
– Plan of lymphatic drainage of the abdomen: lumbar and intestinal lymph trunks.
• Pre-aortic lymph nodes: mesenteric, celiac, superior and inferior mesenteric lymph nodes.
• Para-aortic lymph nodes.
• MALT & Peyer’s patches.
– Lymphatic drainage in the pelvis: External and internal iliac lymph nodes, lymph nodes in fascial sheaths, sacral and common iliac lymph nodes.
• Applied anatomy
• Functional and clinical importance of the lymphatic system; Virchow’s lymph nodes; Retropharyngeal abscess; Clinical applications of enlarged thoracic lymph nodes: involvement of left recurrent laryngeal nerve and phrenic nerve. Pressure on the esophagus. Carinal lymph nodes and bronchoscopy; Communications of lymphatics between thorax and abdomen.
• Radiographic anatomy:
– Lymphangiogrms.
• Surface anatomy of palpable lymph node groups: superficial inguinal, axillary, infraclavicular, outer circle of crevical lymph nodes, deep cervical lymph nodes.
contents of ppt include introduction, embryology, lymphatic organs and tissues, classification of lymph nodes, tnm staging, diseases of lymph nodes, classification of lymph node, inspection and palpation of lymph nodes, composition of lymph, function of lymphatic system and lymph nodes
Prevention of Musculoskeletal disorders & role of physical therapist (assignm...Tahir Ramzan
Prevention of Musculoskeletal disorders & role of physical therapist (assignment). causes of MSK disorders , Factors to be considered in Prevention of MSK disorders.
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
micro teaching on communication m.sc nursing.pdfAnurag Sharma
Microteaching is a unique model of practice teaching. It is a viable instrument for the. desired change in the teaching behavior or the behavior potential which, in specified types of real. classroom situations, tends to facilitate the achievement of specified types of objectives.
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This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
Muktapishti is a traditional Ayurvedic preparation made from Shoditha Mukta (Purified Pearl), is believed to help regulate thyroid function and reduce symptoms of hyperthyroidism due to its cooling and balancing properties. Clinical evidence on its efficacy remains limited, necessitating further research to validate its therapeutic benefits.
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Integrating Ayurveda into Parkinson’s Management: A Holistic ApproachAyurveda ForAll
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Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
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1. Assignment No 1 pathology II
16-09-13
“Enumerate the Anatomy and Physiology
of Lymphatic system. Discuss the pathological
features with reference to the Inflammation and
Infection in the Lymphatic System”
“Anatomy & Physiology of Lymphatic System”
Consists of lymph, lymph vessels, lymph nodes,
lymphatic tissue, and 4 organs
Tonsils
Spleen
Thymus Gland
Peyer’s Patches
Works in conjunction with the circulatory system to
remove wastes and excess fluids from the tissues.
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Drain protein-containing fluid from tissue spaces (primary
function).
o Interstitial fluid can cause edema
Transport fats from the digestive system
o Via lacteals in the villi of the small intestine
Produce lymphocytes
o A type of leukocyte
1
Lymphatic system Function:
2. Develop immunities
o Antibodies
What is Lymph?
A thin, watery fluid composed of intercellular or interstitial fluid,
which forms when plasma diffuses into tissue spaces
Composed of water, digested nutrients, salts, hormones, oxygen,
carbon dioxide, lymphocytes, and metabolic wastes such as urea
When this fluid enters the lymphatic system, it is known as lymph.
Lymphatic Vessels:
Located throughout body in almost all of the tissues that have blood
vessels Small, open-ended lymph vessels act like drainpipes and are
called lymphatic capillaries
Lymphatic capillaries pick up lymph at tissues throughout body
Capillaries then join together to form larger lymphatic vessels, which
pass through lymph nodes.
Contractions of skeletal muscles against lymph vessels cause the
lymph to flow through the vessels.
Lymphatic vessels also have valves that keep lymph flowing one-way
Drains lymph into blood via thoracic duct (main) or right lymphatic
duct.
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Popularly called “ glands”. Located all over body, usually in groups
or clusters; Small, round or oval masses ranging in size from that of a
pinhead to an almond.
Filter lymph and remove impurities such as carbon, cancer cells,
pathogens, and dead blood cells, Produce lymphocytes and antibodies
2
Lymph Nodes:
3. Lymphatic Tissues:
Tonsils – masses of lymphatic tissue that filter interstitial fluid;
there are 3 pairs
Palatine tonsils: located on each side of the soft palate
Pharyngeal tonsils: (also called adenoids) located in the nasopharynx
Lingual tonsils: located on the back of the tongue
T&A not performed as often due to better understanding of
importance of these tissues.
Spleen
An organ located beneath the left side of the diaphragm and in
back of the upper part of the stomach
Produces leukocytes and antibodies
Destroys old erythrocytes
Stores erythrocytes to release into bloodstream if excessive
bleeding occurs
Releases hemoglobin to be recycled
Filters metabolites and wastes from body tissues
Thymus:
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3
A mass of lymph tissue located in center of upper chest
Atrophies after puberty and is replaced by fat and connective
tissue
During early life, it produces antibodies and manufactures
lymphocytes to fight infection
Its function is taken over by the lymph nodes
4. Page
Ability of body to resist infection from pathogens
o Active – response from antigen or vaccination
o Passive – via placenta, breast milk, or antivenom
Antigens
o Foreign proteins that gain access to our bodies via
circulatory, digestive, respiratory, urinary and reproductive
systems
o Cause immune system to produce high molecular weight
proteins called antibodies
4
Immunity:
5. Antibodies or Immunoglobulins
o Bind with specific antigens
o Binding causes agglutination
o Leukocytes eat agglutinate by phagocytosis
___“Pathological Features”___
Hodgkin lymphoma:
Hodgkin lymphoma is a less common nodal disease whose diagnosis
is based on the detection of a characteristic cell, the Reed Sternberg
cell, in the appropriate histologic setting
There are several (five) histologic subtypes, but prognosis is based
primarily on extent of disease.Hodgkin lymphoma is a more curable
disease than non-Hodgkin lymphomas
Now watch me confuse this relatively straightforward information
with the details.
Clinical Features:
Enlarging mass(es), typically painless, at sites of nodal tissue
Compression, infiltration of hollow organs
Pain, obstruction, perforation
Interference with normal organ functionSolid organ infiltration- kidneys, liver, bone marrow
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5
Systemic symptoms: Fever, Night sweats ,Weight loss
If marrow infiltrated, can have leukemic component
6. NHL 2:
Recapitulate the biology and immunophenotype of normal cell
counterpart
Several cytologically and immunologically recognizable stages
of normal lymphoid maturation --> several subtypes of
lymphoma
Clonal malignancies, derived from a single cell that has
undergone a malignant transformation, mutation
Best initially conceptualized as two major clinical types
o Indolent lymphomas
o Aggressive lymphomas
Indolent Lymphomas:
Lymphomas frozen at stages not normally replicating, but may
be circulating
Diseases of slow accumulation, due to defective apoptosis
Often widespread at diagnosis
Prolonged natural history, median survivals >5 years
Will usually respond to chemo- or radiation therapy
Will usually relapse, but respond to same or alternative tx
Currently incurable unless
o Localized disease or
o Marrow ablation with some type of stem cell transplant
Page
6
Classification of indolent lymphomas- later
7. Aggressive lymphomas:
Lymphomas frozen at stages characterized by replication and
accelerated growth
Diseases of defective cell cycle control
More often localized at presentation than indolent lymphomas
More often extranodal
Despite short natural history, curable disease in some with
aggressive therapy
o Approximately 30-40% of adults
o 50-80% children
All childhood lymphomas of this type
Brukkit’s Lymphoma:
Page
Pathology
Benign equivalent is replicating small noncleaved cell of
germinal center:
Diffuse infiltration of lymph node
Very high mitotic rate, lot of ineffective proliferation;
7
Clinical
3% lymphomas
Disease of adults and children- median age 31
Initially recognized in Africa by Thomas Burkitt
Association with Epstein Barr virus infection
Localization in jaw
In US, usually presents in ileocecal region of children
1/3 of all childhood lymphomas
Earlier eras, very aggressive and rapidly fatal
Now, ~70-80% children curable
40% of adults
8. Attracts macrophages to phagocytize> starry sky pattern at
low power
Cytology: round nucleus, smaller than that of reactive
macrophage
Vesicular chromatin and 2-5 nucleoli
Immunophenotype:
o Positive: Monoclonal light chain, CD19, CD10
o Negative: CD5
T cell lymphomas – Precursor T:
Pathology
Benign equivalent immature T cells of thymus
Cytology: “Blast cells” of intermediate size with oval to
“convoluted” nuclear profiles, fine chromatin and 0-1
nucleolus
Again need immunology to distinguish from pre-B
Histology: Diffuse infiltration of thymus/adjacent lymph
nodes
Predominantly leukemic/disseminated
T-cell prolymphocytic leukemia
T-cell large granular lymphocytic (LGL) leukemia
NK cell leukemia
Adult T-cell leukemia/lymphoma
Predominantly nodal
Angioimmunoblastic T-cell lymphoma
Peripheral T-cell lymphoma unspecified
8
Anaplastic large cell lymphoma, T/null-cell
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9. Predominantly extranodal
Mycosis fungoides
Sezary syndrome
Subcutaneous panniculitis-like T-cell lymphoma
Primary cutaneous CD30+ T-cell lymphoproliferative
disorders
NK/T cell lymphoma, nasal and nasal-type
Enteropathy-type intestinal T-cell lymphoma
Hepatosplenic T-cell lymphoma
Hodgkin’s Lymphoma:
Less common than NHL; ~ 10,000 cases per year
Age incidence bimodal, with one peak in late adolescence,
young adulthood, second peak beginning in sixth decade
Bimodal curve shifts to younger ages in poorer countries
Unlike NHL, HL diagnosed by the presence of a minor cellular
component, the Reed-Sternberg cell, found in the appropriate
microscopic cellular background
____________ END ____________
To: Sir Mubben
Page
CMS: 3855
9
By: Tahir Ramzan