The Impact of Intrauterine Manipulators on Outcome and Recurrence Patterns of Endometrial Cancer Patients Undergoing Minimally Invasive Surgery.

Objective: To evaluate the use of manipulators on the outcome of women who had minimally invasive surgery for endometrial cancer. Methods: Retrospective analysis of patients operated with or without an intrauterine manipulator. Results: Six hundred ninety-nine patients were included. The median follow-up was 44 months (range, 29-67). Nineteen (8.8%) patients had positive cytology in the manipulator group versus 21 (4.4%) in the comparison group ( p  = 0.02). Total recurrence rate was similar between the groups (12.3% vs. 11.9%; p  = 0.8). Vaginal vault recurrence was the most common site of recurrence with higher incidence in the manipulator group (4.5% vs. 1.3%; p  = 0.007). Subgroup analysis of low-risk patients who did not receive adjuvant treatment showed higher recurrence rate (8.3% vs. 3%; p  = 0.023) and worse disease-free survival ( p  = 0.01) for the manipulator group. After controlling for other variables, the use of a manipulator did not affect the risk of recurrence for the whole cohort (hazard ratio [HR], 1.28; confidence interval [95% CI], 0.7-2.1, p  = 0.3) and for the low-risk subgroup of patients who did not receive adjuvant treatment (HR, 2.47; 95% CI, 0.8-7, p  = 0.08). Conclusion: The use of a manipulator increases the risk of positive cytology as well as vaginal vault recurrences, but it does not reduce the overall survival of patients.