卵巢低、高级别浆液性癌的临床病理分析及Pax2、p53和Ki-67表达的意义

目的 初步评估卵巢浆液性癌的两级分级系统在病理诊断和预后判断中的应用价值,探讨低、高级别浆液性癌Pax2、p53和Ki-67的表达及其与预后的相关性.方法 依照两级分级系统对卵巢浆液性癌进行分级,分别选取低级别癌38例,高级别癌100例,观察其临床病理特点,并采用免疫组织化学EnVision法检测癌组织中Pax2、p53和Ki-67的表达情况.结果 (1)低级别组的总生存时间、无病生存时间和5年生存率均显著优于高级别组(P＜0.05).(2)低级别组Pax2的阳性率显著高于高级别组(65.8%比13.0%,P＜0.05),而p53强阳性率显著低于高级别组(13.2%比55.0%,P＜0.05),Ki-67阳性指数显著低于高级别组(13.7%比42.1%,P＜0.05).(3)Pax2阳性组的总生存时间和5年生存率均显著优于阴性组(P＜0.05),而无病生存时间的差异无统计学意义(P＞0.05).p53和Ki-67阳性指数与生存时间的差异无统计学意义(P＞0.05).结论 两级分级系统对卵巢浆液性癌的预后判断有提示意义,在临床病理诊断中具有可行性.Pax2、p53和Ki-67在卵巢低、高级别浆液性癌中的表达差异有统计学意义.与p53和Ki-67相比,Pax2更有可能成为卵巢浆液性癌的一个预后相关指标.

Abstract：

Objective To evaluate the two-tier system for the grading of ovarian serous carcinomas,and to analyze Pax2, p53, Ki-67 protein expression and their prognostic values for low- and high-grade ovarian serous carcinomas. Methods A total of 38 cases of low-grade and 100 cases of high-grade ovarian serous carcinomas were selected based on the two-tier grading system. Innnunohistochemistry was used to detect Pax2, p53 and Ki-67 protein expression in all cases. Correlation of the two-tier system with immunohistochemical results and prognostic parameters were performed. Results ( 1 ) The overall survival,disease-free survival and 5-year survival rates were significantly higher in the low-grade serous carcinoma cases than in the high-grade cases ( P ＜ 0. 05 ). (2) Significant differences in protein expressions were found between the low- and high-grade serous carcinomas. The high-grade serous carcinomas had a significantly higher expression level of p53 (55.0% vs 13. 2%, P ＜ 0. 05 ) and Ki-67 (42. 1% vs 13.7%, P ＜ 0. 05 ),while low-grade carcinomas had a significantly higher expression level of Pax2 (65. 8% vs 13.0%,P ＜ 0. 05 ). (3) Pax2 positive cases had a significantly better overall survival and 5-year survival rates than Pax2 negative cases ( P ＜ 0. 05 ). The expressions of p53 and Ki-67 were found to have little correlation with overall survival and disease-free survival( P ＞ 0. 05 ). Conclusions The two-tier system for the grading of ovarian serous carcinomas has a good prognostic value. There are significantly differences in expressions of Pax2, p53 and Ki-67 between low- and high-grade ovarian serous carcinomas. Compared with p53 and Ki-67, Pax2 is likely a better prognostic indicator for ovarian serous carcinoma.

Clinicopathologic study and immunohistochemistry comparison of Pax2, p53 and Ki-67 in low- and high-grade ovarian serous carcinomas

Objective To evaluate the two-tier system for the grading of ovarian serous carcinomas,and to analyze Pax2, p53, Ki-67 protein expression and their prognostic values for low- and high-grade ovarian serous carcinomas. Methods A total of 38 cases of low-grade and 100 cases of high-grade ovarian serous carcinomas were selected based on the two-tier grading system. Innnunohistochemistry was used to detect Pax2, p53 and Ki-67 protein expression in all cases. Correlation of the two-tier system with immunohistochemical results and prognostic parameters were performed. Results ( 1 ) The overall survival,disease-free survival and 5-year survival rates were significantly higher in the low-grade serous carcinoma cases than in the high-grade cases ( P ＜ 0. 05 ). (2) Significant differences in protein expressions were found between the low- and high-grade serous carcinomas. The high-grade serous carcinomas had a significantly higher expression level of p53 (55.0% vs 13. 2%, P ＜ 0. 05 ) and Ki-67 (42. 1% vs 13.7%, P ＜ 0. 05 ),while low-grade carcinomas had a significantly higher expression level of Pax2 (65. 8% vs 13.0%,P ＜ 0. 05 ). (3) Pax2 positive cases had a significantly better overall survival and 5-year survival rates than Pax2 negative cases ( P ＜ 0. 05 ). The expressions of p53 and Ki-67 were found to have little correlation with overall survival and disease-free survival( P ＞ 0. 05 ). Conclusions The two-tier system for the grading of ovarian serous carcinomas has a good prognostic value. There are significantly differences in expressions of Pax2, p53 and Ki-67 between low- and high-grade ovarian serous carcinomas. Compared with p53 and Ki-67, Pax2 is likely a better prognostic indicator for ovarian serous carcinoma.