title: Chronic myelocytic leukemia with a masked Ph1 chromosome.
mesh_terms: D000328:Adult; D002869:Chromosome Aberrations; D002900:Chromosomes, Human, 1-3; D002904:Chromosomes, Human, 21-22 and Y; D002906:Chromosomes, Human, 6-12 and X; D006801:Humans; D007951:Leukemia, Myeloid / Q000235:genetics*; D008297:Male; D014178:Translocation, Genetic