Abstract
We report the case of a patient treated with a combination of fludarabine and cyclophosphamide after suffering from B-cell chronic lymphocytic leukemia for 10 years. Three months after treatment, the patient presented with an unusual association, not previously reported in the literature: Richter syndrome (monotypic Epstein-Barr virus- negative large B-cell lymphoma) with the proliferation of Epstein-Barr virus-positive B cells secreting a polytypic immunoglobulin A. The Epstein-Barr virus-positive lymphoproliferation can be accounted for by the type of immunosuppression induced by the treatment.
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