Methods PCR was used to detect TSER in primary foci in 160 cases of primary gastrointestinal carcinoma and DNA sequence was an alyzed by ABI PRISM 310 gene auto-analyzer.

• 方法采用多聚酶链式反应(PCR)技术检测160例原发性胃肠恶性肿瘤患者(胃癌、结直肠癌各80例)肿瘤原发灶TSER的表达,并测定其DNA序列。