title: Isochromosome (17q) in Philadelphia chromosome (Ph1)-negative juvenile chronic myelocytic leukemia.
abstract: A dicentric isochromosome of the long arm of one chromosome #17 was the only abnormality present in a 12-year-old boy with Philadelphia chromosome (Ph1)-negative juvenile chronic myelocytic leukemia. This association does not seem to have been reported in the literature. It is postulated that the finding of an isochromosome (17q) may also have a negative prognostic value in the Ph1-negative type of chronic myelogenous leukemia.
mesh_terms: D001853:Bone Marrow / Q000473:pathology; D002648:Child; D002869:Chromosome Aberrations / Q000235:genetics*; D002871:Chromosome Banding; D002872:Chromosome Deletion; D025063:Chromosome Disorders; D002902:Chromosomes, Human, 16-18; D002904:Chromosomes, Human, 21-22 and Y; D006801:Humans; D007951:Leukemia, Myeloid / Q000235:genetics* / Q000473:pathology; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000166:cytology; D008297:Male