Objective To analyse the expression of phosphatase and tensin homolog deleted on chromosome 10 (PTEN) in ovarian epithelial cancer and to investigate the relationship between PTEN and clinical pathology and prognosis of ovarian epithelial cancer.Methods Expression of PTEN in 10 normal ovarian tissues,20 benign tumors and 60 cases of ovarian epithelial cancers were detected by immunohistochemical method.Results The positive expression of PTEN in normal ovarian and benign tumor tissues were significantly higher than that in ovarian epithelial cancers (100％ (10/10) vs 80.0％ (16/20) vs 53.3％ (32/60),x2 =7.778 and 4.444 respectively,P ＜ 0.05).The expression of PTEN was correlated to clinical stage,histilogical grade,presence and metastasis of lymph node (x2 =4.339;6.465 ;3.896;10.452;P ＜0.01),but there was no correlation to age,histological type and ascites (x2 =0.004 ;0.388 ; 1.057 ; P ＞ 0.05).Conclusion The expression of PTEN is related to ovarian carcinogenesis and development and may has great value in clinical diagnosis and prognosis of ovarian carcinogenesis.

Objective To observe the expression of HER-2 and TOPO-Ⅱα in ovarian epithelial cancer,analyze the correlation between their expression and provide theoretical basis for clinical diagnosis,prognosis and treatment. Methods Expression levels of HER-2 and TOPO- Ⅱα in 10 normal ovarian tissues,20 benign tumors and 58 cases of ovarian epithelial cancers were detected by immunohistochemical method, and their correlations with pathological features were analyzed. Results The positive expression rate of HER-2 in normal ovarian and benign tumor tissues were significantly lower than ovarian epithelial cancers respectively ( 10. 0% , 15.0% VS 46. 6% ;P ＜ 0. 05 ). The positive expression rate of TOPO- Ⅱα in ovarian epithelial cancers was significantly higher than normal and benign epithelial ovarian tumor tissue (53.4% vs 10. 0%, and 15.0%,Ps ＜ 0. 05 ), but we did not find significant difference in the comparison between normal and benign epithelial ovarian tumor tissue ( Ps ＞ 0. 05 ). The expression of HER-2 and TOPO- Ⅱα were significantly correlated with clinical stages, histological differentiation of tumor cells (Ps ＜ 0. 05 ) ,but there were no correlations between the age or histological type. In ovarian cancer tissues, a positive correlation between the expression of HER-2 and TOPO- Ⅱα was observed ( r = 0. 324, P ＜ 0. 05 ) . Conclusion The overexpression of HER-2 and TOPO- Ⅱαplay an important role in ovarian carcinogenesis and development. The expression of HER-2 is positively correlated with TOPO- Ⅱα in ovarian epithelial cancers. Coexpression of the two moleculars may be involved in the development and progression of ovarian epithelial cancer, which should be further studied.