title: B cell acute lymphoblastic leukemia (ALL) with a 14q+ chromosome abnormality.
abstract: An adult patient with acute lymphoblastic leukemia associated with a 14q+ marker chromosome is presented. The abnormality resulted from a translocation of material from the long arm of chromosome 11. The leukemic cells were found to be B cells on the basis of surface immunoglobulins, lack of receptors for sheep erythrocytes, and a characteristically low level of adenosine deaminase activity. In other patients with ALL studied by us or reported by others in whom chromosome banding was done, a 14q+ chromosome was present in only one instance, also a case of B cell ALL. These two cases are the only examples of B cell ALL studied with chromosome banding reported to date. The frequent occurrence of a 14q+ chromosome in other malignant lymphoproliferative diseases of B cell origin suggests that a general association may exist between the 14q+ abnormality and B cell neoplasms. Cytogenetic analysis may therefore be useful in defining subtypes of ALL and in relating specific chromosomal abnormalities to lymphoproliferative disorders.
mesh_terms: D000243:Adenosine Deaminase / Q000097:blood; D000328:Adult; D001402:B-Lymphocytes; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D002901:Chromosomes, Human, 13-15; D006801:Humans; D007621:Karyotyping; D007945:Leukemia, Lymphoid / Q000235:genetics* / Q000276:immunology; D008297:Male; D011947:Receptors, Antigen, B-Cell
chemical_list: D011947:Receptors, Antigen, B-Cell; D000243:Adenosine Deaminase