Retrospective analysis of stage IIIc uterine carcinoma patients: A single center experience.

Abstract

e15572 Background: Stage IIIC comprises 8% of all endometrial cancers. Both local and systemic relapse risks are high. Current standard of care is adjuvant chemotherapy; however the addition of radiotherapy seems to improve outcomes in retrospective series but prospective data is lacking. We herein report outcomes of our patients with stage IIIC endometrial cancer operated and treated with adjuvant chemotherapy±radiotherapy. Methods: 29 patients with stage IIIC endometrial cancer diagnosed between 2006-2011 were included. Demographic features, tumor characteristics, treatment regimens and patient outcomes in terms of DFS and OS were analyzed. Results: Median age was 64 (41-82). Surgical procedure was TAH+BSO+BPPLND and omentectomy in 26 patients. 4 patients who were operated (TAH+BSO) in another center were restaged and BPPLND and omentectomy were performed. 13 patients (45%) had endometrioid histology, 11 (38%) had papillary serous carcinoma, 2 (7%) had clear cell carcinoma, 2 (7%) had mixed carcinoma and 1 (3%) had undifferentiated carcinoma. 6 patients had ovarian, 9 had uterine serosal involvement, 1 had positive cytology of abdominal washing, 18 (62%) had lymph node-only disease. 14 patients (48%) had positive nodes both in pelvic and paraaortic region, 9 (31%) only in pelvic region and 6 (21%) only in paraaortic region. 24 patients (83%) received chemotherapy with paclitaxel and carboplatin, 13 (45%) received external RT, 4 (14%) received brachytherapy and 3 (10%) patients received chemoradiation with weekly cisplatin or carboplatin. Median follow-up was 19 months. 10 patients recurred during follow-up and 6 patients died. All of the recurrences except one were intraabdominal. 3-year PFS was 64% and OS was 71.6%. Conclusions: With the use contemporary chemotherapy regimens and radiotherapy, we achieved ~70% 3-year survival rate in stage IIIC endometrial carcinoma patients with 45% of the patients having high risk histologies (serous and clear cell). We propose that combined adjuvant chemotherapy and radiation might improve survival in patients with advanced stage disease compared to either modality alone. Results of GOG258 and PORTEC 3 trials should be awaited for definitive conclusions.