Objective: To compare risk factors, treatment, and outcomes in patients with stage I/II mucinous endometrial cancer (MEC) relative to those of patients with endometrioid endometrial cancer (EEC).
Study Design: We conducted a case-control study of patients with MEC and EEC. Patients with stage IA, IB, or II MEC treated at the 2 institutions between 01/01/1996 and 01/01/2007 were identified. Each MEC case was matched with 2 EEC controls by age, stage, grade, and year of diagnosis. The Kaplan-Meier method was used to generate overall survival (OS) data. Factors predictive of outcome were compared using the log-rank test and Cox proportional hazards model.
Results: A total of 34 patients with MEC were compared to 68 controls with EEC. All patients were treated by hysterectomy and bilateral salpingo-oophorectomy. Use of adjuvant radiation therapy was similar between cases and controls. The 5-year disease-free survival (DFS) rates were not significantly different in patients with MEC when compared to those with EEC (89% vs. 92%, respectively, p = 0.2). The 5-year OS rates for patients with MEC and the control group were 95% and 96%, respectively (p = 0.1).
Conclusion: Patients with early-stage with early-stage MEC and EEC have similar DFS and overall survival.
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