title: Double gammopathies: incidence and clinical course of 20 patients.
abstract: The presence of 2 M-components in single patients (double gammopathy) was studied retrospectively by means of the electrophoresis files in Umeå (serving a population of approximately 150 000 inhabitants). During the 11-year period 1974-1984, 109 000 electrophoreses were performed, among which 1034 patients with gammopathy were found. Of these, 20 (2%) had double gammopathy; 3 were associated with lymphoma, 7 with myelomatosis, 9 with monoclonal gammopathy of undetermined significance (MGUS), and 1 with lupus erythematosus disseminatus. It is suggested that one subgroup of double gammopathy (6 patients) had a neoplastic cell clone combined with a normally regulated cell line, the latter marked by a transient M-component. Another subgroup (14 patients) seems to have 2 coexisting different neoplastic cell lines, with persistent double gammopathy.
authors.forename: T
authors.initials: T
authors.lastname: Nilsson
authors.forename: B
authors.initials: B
authors.lastname: Norberg
authors.forename: O
authors.initials: O
authors.lastname: Rudolphi
authors.forename: L
authors.initials: L
authors.lastname: Jacobsson
mesh_terms: D000328:Adult; D000368:Aged; D001853:Bone Marrow / Q000473:pathology; D004587:Electrophoresis, Agar Gel; D005260:Female; D006801:Humans; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007145:Immunoglobulin kappa-Chains; D007146:Immunoglobulin lambda-Chains; D007945:Leukemia, Lymphoid / Q000150:complications / Q000276:immunology; D008180:Lupus Erythematosus, Systemic / Q000150:complications / Q000276:immunology; D008223:Lymphoma / Q000150:complications / Q000276:immunology; D008297:Male; D008875:Middle Aged; D009101:Multiple Myeloma / Q000276:immunology; D010265:Paraproteinemias / Q000150:complications / Q000453:epidemiology* / Q000473:pathology; D012189:Retrospective Studies
chemical_list: D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007075:Immunoglobulin M; D007145:Immunoglobulin kappa-Chains; D007146:Immunoglobulin lambda-Chains