title: Missing Y chromosome in 2 patients with chronic myelocytic leukemia.
abstract: 2 cases of chronic myelocytic leukemia (CML) without Y chromosome are reported. One is a 45-year-old man with Philadelphia-positive CML, and the other a 74-year-old patient with Philadelphia-negative CML. Cytogenetic analysis of bone marrow and peripheral blood cultures with and without PHA stimulation was carried out. The Philadelphia-positive patient died after 15 months, whereas in the case of the Philadelphia-negative patient, the survival time of 27 months exceeded the median survival time usually reported for Philadelphia-negative CML patients, thus indicating a prognostic relevance of the missing Y chromosome.
mesh_terms: D000368:Aged; D002872:Chromosome Deletion; D006801:Humans; D007951:Leukemia, Myeloid / Q000235:genetics*; D008214:Lymphocytes / Q000648:ultrastructure; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D014998:Y Chromosome