title: HTLV-I associated and non-associated primary T-cell lymphoma of gastrointestinal tract.
abstract: The gastrointestinal (GI) tract is the common extranodal site for non-Hodgkin's lymphoma (NHL), and primary lymphoma of GI tract are mostly of B-cell origin. We have treated 16 patients with primary lymphoma of GI tract between 1981 and 1991, of whom 10 (62%) were of B-cell origin, while 6 (38%) were of T-cell origin. The incidence of T-cell phenotype in our hospital was considered to be much higher than that of previous reports and these 6 patients with primary T-cell lymphoma of GI tract were carefully studied. The primary sites were stomach in 4, ileocecum in 1, and duodenum in 1 case. Their T-cell nature was confirmed by immunohistochemical methods. All were peripheral T-cell lymphomas; one was CD 3+ 4- 8- and the other 5 were CD 3+ 4+ 8-. The antibody against human T-cell leukemia virus type I (HTLV-I) was positive in 3 cases (HTLV-I associated), but negative in 3 (HTLV-I non-associated). The integration of HTLV-I proviral DNA in HTLV-I associated patients was demonstrated by Southern blot analysis after DNA amplification by means of polymerase chain reaction (PCR). The clinical features of the HTLV-I associated and HTLV-I non-associated primary T-cell lymphoma of the GI tract were quite different. HTLV-I associated patients showed leukemic manifestations and tumor involvement of the skin at a later stage of the disease. These observations indicated that HTLV-I can play an important role in the occurrence of primary T-cell lymphoma of GI tract.
authors.affiliation: Department of Internal Medicine, Saga Medical School, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Tokioka
authors.forename: Y
authors.initials: Y
authors.lastname: Shimamoto
authors.forename: O
authors.initials: O
authors.lastname: Tokunaga
authors.forename: M
authors.initials: M
authors.lastname: Yamaguchi
mesh_terms: D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis; D015139:Blotting, Southern; D004273:DNA, Neoplasm / Q000032:analysis; D004279:DNA, Viral / Q000032:analysis; D004064:Digestive System / Q000473:pathology; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000453:epidemiology / Q000382:microbiology / Q000473:pathology*; D015481:HTLV-I Antibodies / Q000276:immunology; D015368:Human T-lymphotropic virus 1 / Q000276:immunology / Q000302:isolation & purification; D006801:Humans; D015994:Incidence; D007564:Japan / Q000453:epidemiology; D015459:Leukemia-Lymphoma, Adult T-Cell / Q000453:epidemiology / Q000382:microbiology / Q000473:pathology*; D017254:Leukemic Infiltration; D016399:Lymphoma, T-Cell / Q000453:epidemiology / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D011533:Proviruses / Q000302:isolation & purification
chemical_list: D014408:Biomarkers, Tumor; D004273:DNA, Neoplasm; D004279:DNA, Viral; D015481:HTLV-I Antibodies