Acute renal failure associated with a malignant lymphoproliferative disorder with monoclonal light chain immunoglobulin production. Report of a case.

A case of a 32-year-old male negro is reported in whom acute renal failure was the first manifestation of a diffuse lymphocplasmocytic infiltrative disorder. The malignant cells only produced immunoglobulin light chain (lambda-type). A description of the pathological findings is given. The case presented can be considered an intermediate form between macroglobulinaemia and multiple myeloma.