as (APO-1, CD95) is a 48-kDa type I transmembrane protein which belongs to the TNF (tumor necrosis factor) receptor superfamily.

We detected Epstein-Barr virus (EBV) reactivation in a patient with mantle cell lymphoma (MCL). The patient, a 53-year-old Japanese man, had been referred to our hospital because of generalized lymphadenopathy, hepatosplenomegaly and lymphocytosis and gave a history of intense skin reactions to mosquito bites. The biopsied lymph node contained a monotonous proliferation of medium-sized lymphocytes with scant cytoplasm and slightly irregular nuclei that were CD5 + , CD20 + and CD23 -. Antibody titers of IgG against EBV viral capsid antigen and early antigen were increased, and EBV was detected in the lymphoma cells. This case may suggest a relationship between EBV and MCL.

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