The purpose of this study was to investigate 135 cases of chronic myelogenous leukemia with non-simple Philadelphia chromosome and to analyze their cytogenetic date. Chromosome preparations in 135 cases of patients were performed by using direct method and/or short-term culture, and karyotyping was performed with R-banding technique. The results showed that the overall frequency of chronic myelogenous leukemia with non-simple Philadelphia chromosome (based on 1210 cases of chromosome detection in chronic myelogenous leukemia) was 11.16%, which included 87 cases of chronic phase, 21 cases of accelerated phase and 27 cases of blastic phase. Among 87 cases of patients in chronic phase, 14 cases were with simple variant translocation and 22 cases had complex variant translocation while the others were with other chromosomal abnormalities including 4 cases of +8, 4 cases of + Ph and 2 cases of i (17); among 21 cases of patients in accelerated phage, 4 cases were with +8 and 4 cases were with + Ph while 3 cases were with i (17); among 27 cases of patients in blastic phage, 2 cases were with simple variant translocation and 3 cases had complex variant translocation while the others were with other chromosomal abnormalities including 5 cases of +8, 5 cases of + Ph and 2 cases of i (17). The detection rate of extra chromosomal abnormalities in this group of 135 cases patient were + Ph, +8, i (17), -Y, +19 and +21 in order. There were 16 cases with simple variant translocation and 25 cases with complex variant translocation in in this group of 135 cases. It is concluded that karyotype analysis is helpful in diagnosis, prognosis, pathogenesis and treatment selection for chronic myelogenous leukemia.
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