Purpose To detect the expression of Nek2, Plk1 and Cdk1 in gastric carcinoma and to explore their correlation with clini-copathological factors. Methods We used immunohistochemistry to detect the protein expression of Nek2, Plk1 and Cdk1 in 80 cases of gastric carcinoma. Results The positive rates of Nek2, Plk1 and Cdk1 expressions in 80 cases of gastric carcinoma were 64%, 79% and 85% respectively. While the positive rates of Nek2, Plk1 and Cdk1 expressions in 20 cases normal gastric tissue were 15%, 10% and 20% respectively,with statistical significance (P0. 05). The expression of Plk1 and Cdk1 had a correlation with tumor size, differentiation of gastric cancer, invasion depth, lymph node metastasis and TNM stage (P0. 05). There were significant associations between Nek2 and Plk1, Plk1 and Cdk1, Nek2 and Cdk1 expression (P 0．05)。 Plk1、Cdk1表达与肿瘤大小、分化程度、浸润深度、淋巴结转移及TNM分期呈显著相关性( P0．05)。 Nek2与Plk1、Plk1与Cdk1、Nek2与Cdk1的表达呈显著正相关(P<0．001)。结论 Nek2、Plk1和Cdk1异常表达与胃癌的发生、发展密切相关，联合检测三者对胃癌的诊断、治疗及判断预后具有重要意义。
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