Bone marrow granulomas, fever, pancytopenia, and lupus-like syndrome due to tocainide.

We describe the case of a patient in whom a syndrome of fever, pancytopenia, pleural effusion, hepatosplenomegaly, positive ANA antibodies, and bone marrow granulomas developed in association with tocainide therapy. Tocainide, a recognized, albeit rare, cause of fever, lupus-like syndrome, and cytopenias, should be added to the list of medications that can cause bone marrow granulomas.