[Plasmapheresis treatment in multiple myeloma with kidney insufficiency].

Two patients with multiple myeloma and renal insufficiency are described. In both cases free lambda-chains were demonstrated in blood and urine. Plasmapheresis induced a marked reduction of lambda-chains in both patients. In one patient, a 63 year old man, oliguria ceased but renal function remained impaired and required treatment with longterm hemodialysis. The patient died after 6 1/2 months from sudden circulatory failure. In the second patient, a 68 year old woman, renal function was recovered sufficiently to enable hemodialysis to be stopped. Plasmapheresis may efficiently lower the paraprotein concentration in plasma and bring about improvement of renal function, at least in certain cases. However, treatment should be started before the terminal oliguric stage of renal insufficiency has been reached.