A Tertiary Cancer Center Experience of 52 Cases of Primary Ovarian Mucinous Adenocarcinomas.

 Primary mucinous epithelial ovarian adenocarcinoma (mEOC) constitutes a small percentage (2-5%) of ovarian cancer. Our aim is to understand the clinicopathological characteristics and survival results of patients with mEOC after a long-term follow-up.  This is a retrospective study of primary mEOC cases treated at a tertiary cancer center in India, from January 1, 2005, to December 31, 2012.  Out of 958 malignant ovarian tumors, 52 (5.43%) were mucinous adenocarcinoma. Nearly 71.2% of cases were of early-stage disease, and the remaining were of advanced-stage disease. After a follow-up period of 63 months (range: 1-138 months), the 5-year actuarial overall survival for stages I, II, III, and IV was 92.5, 70, 38.5, and 0%, respectively. Among advanced-stage tumors, half of them progressed without undergoing cytoreductive surgery and died.  Most of the mEOC cases present in early stages and have good clinical outcome. Patients with advanced-stage disease do not respond well to standard chemotherapy regimens in use and have poor survival figures. The use of primary cytoreduction should be considered in the place of interval cytoreduction for advanced mEOC.