title: [Karyotype analysis of 283 cases of myelodysplastic syndrome].
abstract: To explore the implication of karyotype analysis in diagnosis and prognosis of myelodysplastic syndrome (MDS).
  
  
  
  The chromosomes were prepared with direct method, brief culture of cells and R-banding techniques, and then the karyotypic analysis was performed.
  
  
  
  Seventy-seven out of 283 patients (27.21%) had karyotypic abnormalities, including the numeral abnormalities of chromosomes and structural alterations. The most common chromosomal aberrations were +8, -20/20q-, -Y, translocation, -7/7q-, +9, -5/5q-. The rate of abnormal karyotype in refractory anemia with erythroblasts (RAEB) and refractory anemia erythroblasts-transformation (RAEB-t) was much higher than in refractory anemia (RA). Patients with abnormal karyotype or higher IPSS scores had a higher risk of transformation into acute leukemia than patients with normal karyotype or lower IPSS scores (P<0.05).
  
  
  
  MDS is a highly heterogenous disorder and karyotype analysis is helpful for its diagnosis and prognosis estimation.
authors.affiliation: Department of Hematology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China.
authors.forename: Han-zhang
authors.initials: HZ
authors.lastname: Pan
authors.forename: Zhi-mei
authors.initials: ZM
authors.lastname: Chen
authors.forename: Ji-yu
authors.initials: JY
authors.lastname: Lou
authors.forename: Wei-lai
authors.initials: WL
authors.lastname: Xu
authors.forename: Ji
authors.initials: J
authors.lastname: Jin
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D002869:Chromosome Aberrations; D002872:Chromosome Deletion; D002898:Chromosomes, Human, Pair 8 / Q000235:genetics; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male; D008875:Middle Aged; D009190:Myelodysplastic Syndromes / Q000235:genetics*; D011379:Prognosis; D014178:Translocation, Genetic / Q000235:genetics*