PMID- 22783385 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240315 IS - 1792-1074 (Print) IS - 1792-1082 (Electronic) IS - 1792-1074 (Linking) VI - 3 IP - 5 DP - 2012 May TI - A chronic myeloid leukemia case with a unique variant Philadelphia translocation: t(9;22;21)(q34;q11;p12). PG - 1027-1029 AB - The so-called Philadelphia (Ph) chromosome is present in more than 90% of chronic myeloid leukemia (CML) patients. Approximately, 5-10% of these patients show complex translocations involving a third chromosome in addition to chromosomes 9 and 22. Since at present the majority of CML cases are treated with imatinib, variant rearrangements do not exhibit specific prognostic significance. However, events of therapy resistance remain to be studied. In this study, we report a unique case of CML exhibiting an uncommon t(21;22)(p12;q11). This translocation has been characterized by fluorescence in situ hybridization (FISH) and array-proven multicolor banding (aMCB). Using specific probes for the BCR and ABL genes, results of FISH showed a three-way variant Philadelphia translocation (9;22;21)(q34;q11;p12) with a BCR/ABL fusion residing on the der(22) and the 3'BCR region translocated on the short arm of the derivative chromosome 21. In addition, the aMCB technique is significant in the detection of the breakpoints of genetic changes. The underlying mechanisms and prognostic significance of these changes are discussed. FAU - Al-Achkar, Walid AU - Al-Achkar W AD - Molecular Biology and Biotechnology Department, Human Genetics Division, Atomic Energy Commission, Damascus, Syria. FAU - Wafa, Abdulsamad AU - Wafa A FAU - Moassass, Faten AU - Moassass F FAU - Liehr, Thomas AU - Liehr T LA - eng PT - Journal Article DEP - 20120228 PL - Greece TA - Oncol Lett JT - Oncology letters JID - 101531236 PMC - PMC3389665 EDAT- 2012/07/12 06:00 MHDA- 2012/07/12 06:01 PMCR- 2012/02/28 CRDT- 2012/07/12 06:00 PHST- 2011/05/26 00:00 [received] PHST- 2011/07/25 00:00 [accepted] PHST- 2012/07/12 06:00 [entrez] PHST- 2012/07/12 06:00 [pubmed] PHST- 2012/07/12 06:01 [medline] PHST- 2012/02/28 00:00 [pmc-release] AID - ol-03-05-1027 [pii] AID - 10.3892/ol.2012.623 [doi] PST - ppublish SO - Oncol Lett. 2012 May;3(5):1027-1029. doi: 10.3892/ol.2012.623. Epub 2012 Feb 28.