OBJECTIVE The purpose of this study was to evaluate the survival estimates and clinico-pathological variables in patients treated for borderline ovarian tumors. METHODS The patients treated for borderline ovarian tumors were evaluated retrospectively. Data were obtained from hospital records and special gynecologic oncology forms. RESULTS Overall, 100 patients were evaluated. The mean age at the time of diagnosis was 41.7 (range, 19-84). Seventy one (71%) patients underwent surgical staging including 49 (49%) of them with comprehensive surgical staging, 22 (22%) with fertility-sparing surgery. Only 30 (30%) patients were unstaged. The histopathological diagnosis was serous, mucinous, and the other types of borderline ovarian tumor in 54 (54%), 39 (39%), and 7 (7%) of the patients, respectively. Seventy patients had stage IA (70%), 10 had stage IB (10%), 9 had stage IC (9%), 3 had stage IIIA (3%), and 8 had stage IIIC (8%) disease. The stage of only four patients in which disease confined to ovary was upgraded as stage IIIC following surgical staging procedure. The recurrence rate was found 3% (3). The overall disease-free survival rates of BOT in surgically staged (comprehensive, fertility-sparing surgery) and unstaged patients were 97.92%, 95.00%, and 96.30%, respectively. But, the overall tumor-free survival was significantly found to be decreased in cases of young age (<30 years old), performing fertility-sparing surgery and presence of micropapillary architecture or peritoneal implants. Overall survival rates of BOT in surgically staged (comprehensive, fertility-sparing surgery) and unstaged patients were 97.9%, and 100% and 100%, respectively. CONCLUSIONS Low malignant potential ovarian tumors have excellent survival, and the patients can be treated safely by conservative surgery.