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In a retrospective analysis prognostic factors were studied in 204 patients with primary Stage I epithelial ovarian carcinoma (borderline tumors were excluded) treated between 1975 and 1987. Only histologic grade (P = 0.01) and kind of surgery (total abdominal hysterectomy, bilateral salpingo-oophorectomy +/- omentectomy versus unilateral salpingo-oophorectomy, P = 0.02) were found to have a significant influence on survival prognosis (Cox model). All other factors (age, the International Federation of Gynecology and Obstetrics [FIGO] stage, integrity of the capsule, unilaterality versus bilaterality, and histology) were of no prognostic importance. Unilateral salpingo-oophorectomy without any additional staging reduces five-year survival probability (62% versus 84%). Therefore this kind of operation should be abandoned. Furthermore, histologic grade should be a stratification criterion in studies, which will be necessary for proving the value of adjuvant therapy in Stage I epithelial ovarian carcinoma.

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