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作 者:龚胜蓝[1] 邱慧颖[1] 李津婴[1] 韩凤来[1] 宋献民[1] 黄正霞[1] 王健民[1]
机构地区:[1]第二军医大学附属长海医院血液科,上海200433
出 处:《中华血液学杂志》2006年第5期306-309,共4页Chinese Journal of Hematology
摘 要:目的探讨伴有 dic(9;20)(p11-13;q11)的急性淋巴细胞白血病(ALL)的细胞形态学、免疫学、细胞遗传学特征和临床特点。方法骨髓细胞经直接法和24 h 短期培养后按常规方法制备染色体,采用 R 显带技术进行细胞遗传学分析。分别以9号和20号染色体着丝粒探针进行双色荧光原位杂交(FISH)检测。结果 2例患者的临床和血液学改变符合 ALL 诊断,免疫表型分析 B 淋系标志阳性(CD10^+、HLA-DR^+);染色体核型分析显示2例患者均为 dic(9;20):例1为45,XY,der(9)t(9;20)(p11;q11),-20[20],例2为45,XX,der(9)t(9;20)(p13;q11),t(9;22)(q34;q11),-20[10]/46,idem,+8[16]/47,idem,+8,+21[14];其中1例经双色 FISH 检测证实9号和20号染色体之间发生了相互易位,且形成双着丝粒染色体。结论 dic(9;20)(p11-13;q11)是一种少见的重现性核型异常,可能和 ALL 有特殊的联系。FISH 技术是检测该易位的可靠手段。Objective To explore the morphologic, immunophenotypic, cytogenetic and clinical features of acute lymphoblastic leukemia (ALL) patients with dicentric (9 ; 20 ) ( p11-13 ; q11 ). Methods Chromosome specimens of bone marrow cells were prepared by direct method and/or short-time culture. Karyo-typing was performed by R-banding technique, Dual-color fluorescence in situ hybridization (FISH) was performed using both chromosome 9 classical satellite probe and chromosome 20 α-satellite probe in one patient. Results The two ALL patients were positive for CD10 and HLA-DR, showing of B cell origin. Both patients had dicentric (9;20) : case 1 was 45, XY, der(9)t(9;20) (p11 ;q11 ) , -20[20] ; case 2 was 45, XX, der(9)t(9;20)(p13;q11), t(9;22)(q34;q11), -20[ 10]/46, idem, +8[ 16]/47, idem, +8, + 21 [ 14 ]. Mutual translocation between chromosomes 9 and 20 of the dicentric chromosome was confirmed by FISH in one patient. Conclusions Dicentric (9 ;20) (p11 -13;q11 ) is a rare recurring chromosome abnormality associated with ALL. Because of the subtle nature of the translocation, FISH is essential for the detection of this abnormality.
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