[Plasma cell leukemia: our experience in 4 cases].

Clinical findings and response to treatment in four cases with plasma cell leukemia (PCL) out of 152 patients of multiple myeloma diagnosed at the Hospital La Paz from 1969 to 1988 are studied. Three of the four plasma cell leukemia cases presented a primary form, and one a secondary form. Our cases had a lower incidence of lymphadenopathy and splenomegaly than reported in previous series. The incidence of serum M band in PCL was similar to that found in multiple myeloma. The four patients received combination chemotherapy; one of them attained PR lasting for 2 months, and the remaining three failed to respond to similar therapy. The mean duration of survival was less than 8 months. Current treatments are reviewed.