Methods: Peripherral lymphooytes were detected by cytogeneties method,G-banding,Assayed karyotypes under microscope,take count of 20 karyotypes,analysed 3 of them.

• 方法:采用外周血淋巴细胞染色体培养技术,G显带,显微镜下核型分析,计数20个核型,分析3个核型。