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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Gonin, J., Kadiri, H., Bensaci, S. et al. Primary mediastinal anaplastic alk-1-positive large-cell lymphoma of T/NK-cell type expressing CD20. Virchows Arch 450, 355–358 (2007). https://doi.org/10.1007/s00428-007-0371-1
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DOI: https://doi.org/10.1007/s00428-007-0371-1