And C-banding technique was used to help diagnose the heterochromatin.Results SKY wag successfully performed on all of 6 cases.The origin of all marker chromosomes was identified by SKY.

• 并应用C显带技术对染色体的异染色质成分进行辅助诊断.；结果 6个标记染色体病例均成功地进行了SKY技术分析；并明确了标记染色体的来源;