Serum beta-lipoprotein and other specific protein concentrations in patients with immunocytoma.

Serum beta-lipoprotein and other specific protein concentrations were measured in 56 patients suffering from multiple myelomatosis, "benign" paraproteinaemia or Waldenström's macroglobulinaemia and in 56 control subjects. The mean level of B-lipoprotein in untreated patients with multiple myelomatosis and macroglobulinaemia was significantly lower than that of the controls. Patients who responded to chemotherapy showed a rapid return to normal of the beta-lipoprotein concentration, while the level remained unchanged in most of those who did not.