lymphoma

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lymphoma,

a cancer of the tissue of the lymphatic systemlymphatic system
, network of vessels carrying lymph, or tissue-cleansing fluid, from the tissues into the veins of the circulatory system. The lymphatic system functions along with the circulatory system in absorbing nutrients from the small intestines.
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. There are two categories of lymphomas. One type is termed Hodgkin's diseaseHodgkin's disease,
a type of cancer of the lymphatic system. First identified in 1832 in England by Thomas Hodgkin, it is a type of malignant lymphoma. Incidence peaks in young adults and the elderly.
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, the other, non-Hodgkin's lymphoma (see lymphoma, non-Hodgkin'slymphoma, non-Hodgkin's,
any cancer of the lymphoid tissue (see lymphatic system) in which the Reed-Sternberg cells characteristic of Hodgkin's disease (the other category of lymphoma) are not present.
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). See also neoplasmneoplasm
or tumor,
tissue composed of cells that grow in an abnormal way. Normal tissue is growth-limited, i.e., cell reproduction is equal to cell death. Feedback controls limit cell division after a certain number of cells have developed, allowing for tissue repair
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.
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lymphoma

[lim′fō·mə]
(medicine)
Any neoplasm, usually malignant, of the lymphoid tissues.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Hepatosplenic T-cell lymphoma usually involves the spleen, liver, and bone marrow.
Hepatosplenic T-cell lymphoma shows phenotypic aberrancy through frequent loss of CD5 and/or CD7, as well as reactivity with multiple killer immunoglobulin-like receptors and a weak to negative reaction to CD94.
In addition to extensive immunophenotypic analysis, correlation with cytogenetic studies and molecular tests may be needed for a definitive diagnosis of hepatosplenic T-cell lymphoma.
Hepatosplenic T-cell lymphoma should also be differentiated from infectious mononucleosis.
Intravascular location of atypical lymphocytes is paired with small cell size or immunophenotypes distinct from IVLBCL in marginal zone lymphoma and hepatosplenic T-cell lymphomas. (16) The intravascular involvement of splenic marginal zone lymphoma and mantle-cell lymphoma is secondary to a more dominant extravascular component, mandating adequate tissue sampling for their exclusion.