Standardized fluorescence in situ hybridization testing based on an appropriate panel of probes more effectively identifies common cytogenetic abnormalities in myelodysplastic syndromes than conventional cytogenetic analysis: A multicenter prospective study of 2302 patients in China

• DOI: 10.1016/j.leukres.2015.02.005
• Publication Date: 2015-02-18T07:03:33Z
• Authors: Yue-Yun Lai; Xiao-Jun Huang; Juan Li; Ping Zou; Ze-Feng Xu; Hui Sun; Zong-Hong Shao; Dao-Bin Zhou; Fang-Ping Chen; Zhuo-Gang Liu; Huan-Ling Zhu; De-Pei Wu; Chun Wang; Yin Zhang; Yan Li; Ming Hou; Xin Du; Xin Wang; Wei Li; Yong-Rong Lai; Jin Zhou; Yu-Hong Zhou; Mei-Yun Fang; Lin Qiu; Xiao-Min Wang; Guang-Sen Zhang; Ming Jiang; Ying-Min Liang; Lian-Sheng Zhang; Xie-Qun Chen; Hai Bai; Jin-Ying Lin
• Keywords: Adult; Aged, 80 and over; Chromosome Aberrations; Male; China; Adolescent; Middle Aged; Reference Standards; 3. Good health; Young Adult; 03 medical and health sciences; 0302 clinical medicine; Predictive Value of Tests; Myelodysplastic Syndromes; Cytogenetic Analysis; Humans; Female; Prospective Studies; Child; In Situ Hybridization, Fluorescence; Aged; Fluorescent Dyes

In an attempt to establish the advantages of fluorescence in situ hybridization (FISH) studies over conventional cytogenetic (CC) analysis, a total of 2302 de novo MDS patients from 31 Chinese institutions were prospectively selected in the present study for both CC and standardized FISH analysis for +8, -7/7q-, -5/5q-, 20q- and-Y chromosomal abnormalities. CC analysis was successful in 94.0% of the patients; of these patients, 35.9% of the cases were abnormal. FISH analysis was successful in all 2302 patients and detected at least one type of common cytogenetic abnormality in 42.7% of the cases. The incidences of +8, -7/7q-, -5/5q-, 20q- and-Y chromosomal abnormalities by FISH were 4.1% to 8.7% higher than those by CC. FISH identified abnormalities in 23.6% of the patients exhibiting normal CC results and revealed that 20.7% of the patients with adequate normal metaphases (≥20) had abnormal clones. FISH identified cytogenetic abnormalities in 50.4% of the patients with failed CC analysis. In summary, our multicenter studies emphasised and confirmed the importance of applying standardized FISH testing based on an appropriate panel of probes to detect common cytogenetic abnormalities in Chinese de novo MDS patients, particularly those with normal or failed CC results.