Hepatosplenic gammadelta T-cell lymphoma presenting with immune-mediated thrombocytopenia and hemolytic anemia (Evans' syndrome).

We describe an unusual case of hepatosplenic T-cell lymphoma in a 61-year-old man who presented with fever, hepatosplenomegaly, anemia, and thrombocytopenia. A spleen biopsy was consistent with T-cell lymphoma. Cytogenetic studies did not reveal chromosome abnormalities. Using the polymerase chain reaction approach, clonality of the T-cell receptor gamma-chain gene rearrangement could be demonstrated, while Southern blot analysis disclosed only a germline configuration of the T-cell receptor beta chain genes. Of interest, an immune-mediated mechanism was demonstrated and was most likely responsible for erythrocyte and platelet destruction; this is, therefore, the first report of gamma T-cell lymphoma in association with Evans' syndrome. Initial steroid treatment was efficacious in limiting autoimmunity but constitutional symptoms did not subside. Chemotherapy (MACOP-B) was successful in obtaining complete clinical remission. Finally, thrombocytopenia in gammadelta T-cell lymphoma patients should be routinely evaluated for platelet autoantibodies. Copyright 2002 Wiley-Liss, Inc.