[Immunological and electron microscope characteristics of peripheral blood lymphocytes in myeloma disease]

B-lymphocytes of peripheral blood were examined with cytochemical, immunological and electron-microscopic methods in 18 patients with myeloma. The results made it possible to divide all patients into 3 groups distinguishing by cytomorphology of peripheral blood lymphocytes, expression of surface and cytoplasmic immunoglobulins and determination on the surface membrane of receptors to Fc-fragments of IgG and IgM and C3-component of the complement. Data revealed clonal character of B-lymphocytes.