title: A specific chromosome abnormality of t(4;12)(q11-12;p13) in CD7+ acute leukaemia.
abstract: Three cases of acute leukaemia with t(4;12) (q11-12;p13) karyotypic abnormalities were analysed. They had the following common clinical and biological characteristics: (1) dysplasia of three haemopoietic lineages: (2) absent or low myeloperoxidase activity: and (3) retention of platelets in the peripheral blood and megakaryocytes in the bone marrow. There were increased numbers of basophils in the bone marrow and peripheral blood in two of the cases. In all, the blast cells displayed the unique immunophenotype CD7+CD13+CD34+HLA-DR+. The blasts analysed in one case expressed c-kit on the membrane surface. These findings suggest that the t(4;12) (q11-12;p13) abnormality is associated with a particular type of acute leukaemia, one in which the morphology and immunophenotype suggest that the translocation may have occurred at an early stage of haemopoiesis.
authors.affiliation: Fourth Department of Internal Medicine, Hiroshima Red Cross Hospital, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Harada
authors.forename: H
authors.initials: H
authors.lastname: Asou
authors.forename: T
authors.initials: T
authors.lastname: Kyo
authors.forename: H
authors.initials: H
authors.lastname: Asaoku
authors.forename: K
authors.initials: K
authors.lastname: Iwato
authors.forename: H
authors.initials: H
authors.lastname: Dohy
authors.forename: K
authors.initials: K
authors.lastname: Oda
authors.forename: Y
authors.initials: Y
authors.lastname: Harada
authors.forename: K
authors.initials: K
authors.lastname: Kita
authors.forename: N
authors.initials: N
authors.lastname: Kamada
mesh_terms: D000208:Acute Disease; D000328:Adult; D015703:Antigens, CD / Q000032:analysis*; D019011:Antigens, CD7; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis*; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D002881:Chromosomes, Human, Pair 12; D002894:Chromosomes, Human, Pair 4; D006801:Humans; D016130:Immunophenotyping; D007621:Karyotyping; D007938:Leukemia / Q000188:drug therapy / Q000235:genetics* / Q000276:immunology; D008297:Male; D008875:Middle Aged; D014178:Translocation, Genetic
chemical_list: D015703:Antigens, CD; D019011:Antigens, CD7; D000945:Antigens, Differentiation, T-Lymphocyte