Peripheral neuropathy with gammopathy responding to plasmapheresis.

Two patients with subacute sensorimotor peripheral neuropathy were found to have benign gammopathies. They both responded to treatment by plasmapheresis. We suggest that a vigorous search for a paraprotein should be made in all undiagnosed patients presenting with peripheral neuropathy, including electrophoresis with isoelectric focusing. Plasmapheresis may be a treatment modality that should be explored in such cases.