title: T-lymphocyte variant of hairy-cell leukemia.
abstract: Immunohematologic studies on cells from a patient with the clinicopathologic syndrome of hairy-cell leukemia showed that the neoplastic cells had receptors for sheep erythrocytes and therefore had human T-lymphocyte characteristics. The leukemic cells did not have the membrane receptors or immunoglobulin markers of B lymphocytes or monocytes nor did they synthesize immunoglobulin. A lymphoid cell line established in vitro from the cells had the same T-lymphocyte characteristics. The lymphoid cell line is positive for tartrateresistant acid phosphatase, forms rosettes with untreated sheep erythrocytes, and reacts with an anti-T-lymphocyte antiserum. Thus the syndrome of hairy-cell leukemia may occasionally result from the neoplastic proliferation of T-lymphocytes as well as from the more usual B-lymphocyte form. This situation is analogous to that described previously in chronic lymphocytic leukemia and other lymphoproliferative disorders.
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism; D000328:Adult; D000818:Animals; D002460:Cell Line; D004912:Erythrocytes / Q000276:immunology; D006801:Humans; D007136:Immunoglobulins / Q000096:biosynthesis; D007943:Leukemia, Hairy Cell / Q000201:enzymology / Q000276:immunology* / Q000473:pathology; D008297:Male; D012397:Rosette Formation; D012756:Sheep / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D013644:Tartrates
chemical_list: D007136:Immunoglobulins; D013644:Tartrates; D000135:Acid Phosphatase