【摘要】 背景与目的:垂体瘤是常见的颅内良性肿瘤。本研究旨在了解垂体瘤常规细胞遗传学分析最为适宜的方法,同时对垂体瘤细胞遗传变异的特性进行分析。方法:运用直接法和短期培养法对25例垂体瘤组织进行R显带核型分析。结果:在25例垂体瘤中,发现直接法获得中期分裂相为68.0%(17/25),其中异常核型为44.0%(11/25);短期培养法获得中期分裂相为84.0%(21/25),但异常核型为12.0%(3/25)。染色体的获得性增加依次为X(6/11)、7(4/11)、8(2/11)、5(2/11),而染色体的丢失依次为11(5/11)、9(4/11)、13(3/11),后者多见于侵袭性垂体瘤。结论:直接法是垂体瘤常规细胞遗传学研究较为适宜的方法之一。垂体瘤具有染色体的变异,其中获得性增加的染色体是X、8、7,丢失的染色体是11、9、13。染色体结构的异常较为少见。染色体的丢失和结构的异常与肿瘤的生物学行为有一定的关系。更多还原

【Abstract】 Background & Objective: Pituitary adenoma is one of the most common intracranial benign tumor. This study was designed to seek the most suitable method for cytogenetic study of pituitary adenoma(PA), and then to analyze the genetic change of PA cell. Methods: Twenty five samples of primary PA were examined by R banding through direct preparation(DP) and short term culture(STC) to analyze genomic alterations. Results: A karyotype of 17 samples was identified in 25 PAs by using the DP,whereas there was a karyotype of 21 samples by using the STC. An abnormal clonal karyotype was observed in 11 samples processed by the DP, however only 3 of 25 samples when processed by the STC. The common chromosomal alterations included gains of chromosomes X(6/25), 7(4/25), 8(2/25), 5(2/25) as well as losses of chromosomes 11(5/25),9(4/25),13(3/25), and the latter was observed predominantly in invasive PAs. Conclusions: DP is one of the most suitable methods for the cytogenetic study of PA. There were multiple regions of chromosomes with copy number changes in PA including gains of chromosomes X, 7, 8, and losses of chromosomes 11, 9, 13. However, structural chromosome aberrations are not common. The loss of chromosome and the abnormality of structure may have some correlation with the biologic behavior of PA.更多还原