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System – Lymphatic

This category comprises disorders of the the lymphatic system that involve lymph vessels, lymph, lymph nodes, lymphocytes, and lymph organs.
Lymph vessels carry lymph, a clear fluid that contains white blood cells, especially B-cell and T-cell lymphocytes, to all body tissues. Lymph vessels are connected to lymph nodes that store white blood cells and remove bacteria or other harmful substances that may be in the lymph. Organs of the lymphatic system are bone marrow, thymus gland, lymph nodes, spleen, tonsils, and adenoids.

Intraepithelial Lymphocytosis In Normal Small Bowel Samples 

What Is Intraepithelial Lymphocytosis In Normal Small Bowel Samples? Intraepithelial lymphocytosis is characterized by an abnormal increase in the numbers of intraepithelial lymphocytes (IELs) that are present in the small intestinal mucosa. Q: What are intraepithelial lymphocytes? A: Intraepithelial lymphocytes are ...

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Cancer Predisposition In Children 

What Is Cancer Predisposition In Children? Cancer predisposition in children signifies a higher than normal risk of developing cancer. Cancer is the uncontrolled division of abnormal cells in the body. Among the 12 major types of childhood cancers, leukemias (blood ...

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Mesenteric Lymph Node Cavitation And Hyposplenism

What Is Mesenteric Lymph Node Cavitation And Hyposplenism? Mesenteric lymph node cavitation and hyposplenism combination is a rare lymphatic entity. It is characterized by involution (degeneration) of a mesenteric lymph node (abdominal) and absence of functional spleen tissue. Q: What ...

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Lymphoma, Enteropathy-Associated T-Cell (EATL) 

What Is Enteropathy-Associated T-Cell Lymphoma? Enteropathy associated T-cell lymphoma (EATL), although rare, is a tumor of intraepithelial lymphocytes. It is the most common primary gastrointestinal T-cell lymphoma and is characterized by its aggressive course and poor prognosis. Primary means this ...

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What Is Lymphadenopathy? Lymphadenopathy is an alteration of lymph nodes that is characterized by enlargement of lymph nodes greater than 1.5 cm caused by proliferation (increased production) of lymphocytes within the node. Q: What are lymph nodes? A: Lymph nodes ...

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Lymphomas, Extraintestinal

What Are Extraintestinal Lymphomas? Extraintestinal lymphomas (non-Hodgkin’s) are malignancies that arise in peripheral lymphatic tissue outside the intestinal tract from B-cell and T-cell lymphocytes. Q: What is peripheral lymphatic tissue? A: Peripheral lymphatic tissue includes lymph vessels, lymph, lymph nodes, and ...

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Celiac Disease, Refractory

What Is Refractory Celiac Disease? Refractory celiac disease, formerly called refractory sprue, is a severe complication characterized by persistence of symptoms and intestinal inflammation despite gluten free diet after 12 months.1 Refractory celiac disease appears in two forms, ulcerative jejunitis (RCD ...

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Lymphoma, B-Cell Non-Hodgkin’s

What Is B-Cell Non-Hodgkin’s Lymphoma? Bcell non-Hodgkin’s lymphoma is a malignant, monoclonal (arising from a single cell) proliferation of lymphocytes that is preceded by lymphadenopathy and characterized by varying, less predictable spread than Hodgkin’s disease. Lymphadenopathy is enlargement of lymph ...

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