title: Erythroblastic transformation of Philadelphia chromosome (Ph1)-positive chronic myelogenous leukemia associated with marked chromosomal rearrangements.
abstract: In a 22-year-old female with Philadelphia chromosome (Ph1)-positive chronic myelogenous leukemia (CML) a tumor consisting of megaloblastic proerythroblasts appeared in the right ilio-femoral region 2 years and 8 months after the diagnosis of the disease and was treated effectively with irradiation. She developed erythroblastic transformation 3 months after the tumor appeared. Cytogenetic study of the bone marrow cells in the acute phase revealed marked chromosomal rearrangements such as ring, dicentric, or tricentric chromosomes.
mesh_terms: D000328:Adult; D002869:Chromosome Aberrations; D002871:Chromosome Banding; D002875:Chromosomes / Q000648:ultrastructure*; D002904:Chromosomes, Human, 21-22 and Y; D005260:Female; D006801:Humans; D007621:Karyotyping; D004915:Leukemia, Erythroblastic, Acute / Q000209:etiology / Q000235:genetics*; D007951:Leukemia, Myeloid / Q000150:complications / Q000235:genetics*