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Anaplastic large cell lymphoma
Pronunciation
Definition 1
An aggressive (fast-growing) type of non-Hodgkin lymphoma that is usually of the T-cell type. The cancer cells express a marker called CD30 or Ki-1 on the surface, and may appear in the lymph nodes, skin, bones, soft tissues, lungs, or liver. Also called ALCL. (NCI Dictionary)
Definition 2
A peripheral (mature) T-cell lymphoma, consisting of usually large anaplastic, CD30 positive cells. The majority of cases are positive for the anaplastic large cell lymphoma (ALK) protein. The most frequently seen genetic alteration is a t(2;5) translocation. Majority of patients present with advanced disease. The most important prognostic indicator is ALK positivity, which has been associated with a favorable prognosis. (NCI Thesaurus/WHO)
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