Dzatic-Smiljkovic, O. (54986368200)O. (54986368200)Dzatic-SmiljkovicVasiljevic, M. (6603666911)M. (6603666911)VasiljevicDjukic, M. (57208476700)M. (57208476700)DjukicVugdelic, R. (54986367300)R. (54986367300)VugdelicVugdelic, J. (54989880000)J. (54989880000)Vugdelic2025-06-122025-06-122011https://www.scopus.com/inward/record.uri?eid=2-s2.0-84857005037&partnerID=40&md5=cd8d18dfc06e8a74c7a13baaf5d5318ahttps://remedy.med.bg.ac.rs/handle/123456789/9922Purpose: The aim of this study was to determine the frequency of endometriosis in epithelial ovarian cancer patients. Methods: Patients who had undergone epithelial ovarian cancer surgery between 2000 and 2004 were subjected to a retrospective analysis. The analysis focused on the presence of ovarian endometriosis, histological types and stages of ovarian cancer, treatment types and five-year survival rate. Results: Out of the 210 operated ovarian cancer patients, 23 had coexisting ovarian endometriosis. Ovarian endometriosis was detected in 3.5% (4 of 113 patients) of cases with serous ovarian cancer, in 31.6% ( 12 of 38 patients) of cases with endometrioid, and in 36.8% (7 of 19 patients) of cases with clear cell ovarian cancer. The treatment of ovarian cancer patients was a combination of surgery and chemotherapy. Conclusion: Endometriosis was most frequently present in patients with clear cell (36.8%) and endometrioid ovarian cancers (31.6%). The five-year survival rate for ovarian cancer patients in all stages was 39.1%.ChemotherapyClear cell ovarian cancerEndometrioid ovarian cancerEndometriosisOvarian cancerSerous ovarian cancerSurgery