title: Monoclonal IgM and chronic urticaria: two cases.
abstract: We report two patients with chronic urticaria and serum monoclonal IgM without detectable lymphoid disease. In the 14 cases previously reported, clinical, histologic, and immunologic characteristics appeared very similar. The pathogenesis of this peculiar entity is discussed.
mesh_terms: D000368:Aged; D001706:Biopsy; D002908:Chronic Disease; D005260:Female; D006801:Humans; D006942:Hypergammaglobulinemia / Q000473:pathology*; D007075:Immunoglobulin M / Q000032:analysis*; D007145:Immunoglobulin kappa-Chains / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D008998:Monoclonal Gammopathy of Undetermined Significance / Q000276:immunology / Q000473:pathology*; D012867:Skin / Q000473:pathology; D014581:Urticaria / Q000276:immunology / Q000473:pathology*
chemical_list: D007075:Immunoglobulin M; D007145:Immunoglobulin kappa-Chains