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目的:检测原发性胃癌组织中18号染色体的杂合性丢失(loss of heterozygosity,LOH)情况.方法:联合应用激光捕获显微切割(laser capture microdissection,LCM)-高可信度全基因组扩增(high fidelity-Whole genomeamplification,HF-WGA)-变性高效液相色谱(denaturedhigh pressure liquid chromatography,DHPLC)方法,检测胃癌中18号染色体上短插入/缺失多态(short