微卫星是一种新型的遗传学标记，构成了第２代基因图谱上的图标。以微卫星作为分子标记检测微卫星不稳定性（ＭＳＩ）和杂合性缺失（ＬＯＨ），为揭示肿瘤的发病机制及寻找新的抑癌基因开辟了新的途径。ＷＴ１基因是ＷｉｌｍｓＴｕｍｏｒ的相关基因，是一种抑癌基因。在血液系 Microsatellites are a new type of genetic markers that make up the second generation of genetic maps. Using microsatellite as a molecular marker to detect microsatellite instability (MSI) and loss of heterozygosity (LOH) opens up new avenues for revealing the pathogenesis of tumor and finding new tumor suppressor genes. WT1 gene is WilmsTumor related gene, is a tumor suppressor gene. In the blood system