title: Isolated marrow lymphoma: an entity of possible T-cell derivation.
abstract: Seven adults had a distinct clinicopathologic type of lymphoproliferative disorder of the bone marrow. All patients presented with weakness and pancytopenia; no evidence of gross extramedullary involvement was found. In 5 cases severe and prolonged bone marrow hypoplasia was associated with combination chemotherapy; 1 patient died of infection during initial therapy. In 6 of the 7 cases, clinical improvement occurred following therapy. As a terminal event, 2 patients developed a leukemic phase. Tumor cell from 4 patients were studied immunologically, and in 2 patients surface marker characteristics suggestive of T-cell tumor origin were found. In 2 cases, ultrastructural studies of lymphoid cells were compatible with a T-cell neoplasm. The above data suggest that these cases represent a distinct type of chemotherapy-sensitive lymphoma in which conservative initial treatment may induce a response without prolonged bone marrow hypoplasia.
mesh_terms: D000328:Adult; D000368:Aged; D000970:Antineoplastic Agents / Q000627:therapeutic use; D001853:Bone Marrow / Q000187:drug effects / Q000473:pathology*; D001856:Bone Marrow Examination; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D007938:Leukemia / Q000209:etiology; D008223:Lymphoma / Q000188:drug therapy / Q000209:etiology* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D013601:T-Lymphocytes / Q000473:pathology*
chemical_list: D000970:Antineoplastic Agents