Waldenstrom's macroglobulinemia presenting with pleuropulmonary and gastric manifestations.

A case of Waldenstrom's macroglobulinemia is reported in which the main clinical presentation was related to pulmonary infiltrations and pleural effusion. Serum protein studies demonstrated the characteristic monoclonal increase in immunoglobulin M (IgMK). Pleural and percutaneous lung biopsies showed dense lymphocytic infiltration. Gastric biopsy also showed focal atypical lymphoid hyperplasia. There was good clinical and radiological response to treatment with chlorambucil and prednisolone.