A patient presented with a peripheral neuropathy and was found to have
Waldenstrom's macroglobulinemia with high serum titers of antibodies
to myelin-associated glycoprotein. He developed parkinsonism that was
poorly responsive to levodopa. He failed conventional therapy and was
treated with autologous bone marrow transplantation, which resulted in
improvement of the neuropathy but not his parkinsonism. Critical cyto
reduction in the B-cell clone may be necessary for improvement of the
neuropathy of Waldenstrom's macroglobulinemia.