Acute leukemia in Burkitt lymphoma.

Burkitt lymphoma uncommonly presents as a acute leukemia. We describe the clinical course and findings of a 14-year-old female with Burkitt lymphoma who presented with acute leukemia. splenomegaly and an abdominal mass. She responded initially to prednisone alone and later achieved full remission with combination chemotherapy. Established morphologic criteria and clinical course were consistent with the diagnosis of Burkitt lymphoma (1), although B-cell determinants were not present on her tumor cells.