Primary mediastinal anaplastic alk-1-positive large-cell lymphoma of T/NK-cell type expressing CD20.
Virchows Arch 2007;
450:355-8. [PMID:
17252228 DOI:
10.1007/s00428-007-0371-1]
[Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2006] [Revised: 12/13/2006] [Accepted: 01/09/2007] [Indexed: 10/23/2022]
Abstract
We describe an unusual case of ALK-1-positive primary mediastinal lymphoma with the morphology of an anaplastic large-cell lymphoma (ALCL) of T/NK cell type but expressing CD20. This tumour had T/NK morphology and immunophenotype, as demonstrated by its expression of CD30, EMA, ALK-1, CD7 and TiA-1 and the lack of expression of B-cell markers other than CD20. The significance of such a co-expression of a B cell-associated antigen in a case of ALCL of T/NK cell type is discussed.
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