Analysis of the outcome of patients with stage IV uterine serous carcinoma mimicking ovarian cancer

ObjectivesTo identify clinicopathological factors that might influence survival in patients with stage IV uterine serous carcinoma, and to compare survival outcomes in patients with stage IV uterine serous carcinoma managed with neoadjuvant chemotherapy followed by interval cytoreduction (with or without adjuvant chemotherapy), primary cytoreductive surgery followed by adjuvant chemotherapy. MethodsA retrospective cohort study of all patients with stage IV Uterine serous carcinoma treated between 2005 and 2015 within a regional cancer centre. Progression-free and overall survival rates were calculated using the Kaplan-Meier method. ResultsOf 50 women with stage IV uterine serous carcinoma who met inclusion criteria, 37 underwent primary cytoreductive surgery, nine received neoadjuvant chemotherapy with planned interval cytoreductive surgery and four received palliative care only. A pre-treatment diagnosis of stage IV uterine serous carcinoma was made for only 45.9% of the primary cytoreductive surgery group and 56.6% of the neoadjuvant chemotherapy group, with advanced ovarian cancer the most common preoperative misdiagnosis. Median follow up was 19 months. Median overall survival was 27 months for the primary cytoreductive surgery group, 20 months for the neoadjuvant chemotherapy group and two months for the palliative care group. Optimal cytoreduction was achieved in 67.6% of the primary cytoreductive surgery group and 87.5% of the neoadjuvant chemotherapy group who underwent interval cytoreduction. Optimal cytoreduction was associated with improvement in overall survival, compared with suboptimal cytoreduction (36 versus 15 months; P=0.16). Adjuvant chemotherapy was associated with significantly higher overall survival compared with no adjuvant chemotherapy (36 versus four months; P<0.05). Median overall survival was 16 months for those with pure uterine serous carcinoma (n=40), compared with 32 months for those with mixed histopathology (n=10). ConclusionStage IV uterine serous carcinoma can mimic advanced ovarian cancer. It carries a poor prognosis, which is worse for pure uterine serous carcinoma than for mixed-type endometrial adenocarcinoma. Neoadjuvant chemotherapy followed by interval cytoreduction and adjuvant chemotherapy seems to be a safe option, with an increased rate of optimal cytoreduction and comparable overall survival, compared with primary cytoreductive surgery. Adjuvant chemotherapy significantly improves survival in all groups. Primary objectiveTo analyse the clinicopathological factors that might influence the progression-free survival and overall survival in patients with stage IV uterine serous carcinoma treated at Queensland Centre for Gynecological cancer. Secondary objectiveTo compare the survival outcomes of patients with stage IV uterine serous carcinoma treated with neoadjuvant chemotherapy and interval cytoreduction, with those treated with primary cytoreductive surgery followed by adjuvant chemotherapy and patients who received palliative care only. PRECISOptimal cytoreduction and adjuvant chemotherapy improved survival in stage IV uterine serous carcinoma. Neoadjuvant chemotherapy was feasible and safe. Patients with microscopic disease have similar poor prognosis. HIGHLIGHTSO_LIPure uterine serous carcinoma carries a worse prognosis compared to mixed uterine serous carcinoma C_LIO_LIOptimal cytoreduction and adjuvant chemotherapy improve survival in Stage IV uterine serous carcinoma C_LIO_LINeoadjuvant chemotherapy is feasible and a safe option in the management of stage IV uterine serous carcinoma C_LI