title: Increased numbers of lymphocytes with single class surface immunoglobulins in reactive hyperplasia of lymphoid tissue.
abstract: Forty-seven lymph nodes and one stomach exhibiting reactive hyperplasia from 40 patients were examined by morphologic and immunologic methods. Twelve lymph nodes and one stomach from ten patients had a significantly increased number (greater than 25%) of lymphocytes, with single class surface immunoglobulins or plasma cells, and plasmacytoid lymphocytes secreting single class immunoglobulins. In three cases, a diagnosis of malignancy was subsequently made on the basis of morphological and immunological evidence of tumor in other tissue. Five patients had collagen disorders, two had a persistent unexplained hypergammaglobulinemia, and two had no recognized associated disease. The significance of an increase of B lymphocytes with single class surface immunoglobulins in these cases is presently not clear, but patients with similar findings should have extensive investigation and persistent follow-up.
mesh_terms: D000328:Adult; D001402:B-Lymphocytes / Q000276:immunology; D003095:Collagen Diseases / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006965:Hyperplasia; D008198:Lymph Nodes / Q000276:immunology / Q000473:pathology*; D008214:Lymphocytes / Q000276:immunology*; D008223:Lymphoma / Q000473:pathology; D008297:Male; D008875:Middle Aged; D010950:Plasma Cells / Q000276:immunology; D011947:Receptors, Antigen, B-Cell / Q000032:analysis*; D012397:Rosette Formation
chemical_list: D011947:Receptors, Antigen, B-Cell