Does duration of hysteroscopy increase the risk of disease recurrence in patients with endometrial cancer? A multi-centre trial.

Women with endometrial cancer often undergo hysteroscopy during their diagnostic work-up. Whether or not the duration of hysteroscopy affects the rate of positive peritoneal cells and the duration of recurrence-free survival is unknown. In a retrospective multi-centre study, the records of 552 patients with endometrial cancer were investigated. Duration of hysteroscopy was correlated with clinicopathological parameters and patient survival data. The mean [standard deviation (SD)] duration of hysteroscopy was 18.2 (10.5) min in the study population and 17.9 (10.1) min and 17.9 (10.2) min in patients with positive (n=109) and negative peritoneal cytology (n=443), respectively (p=0.9). There were no statistically significant correlations between duration of hysteroscopy and positive peritoneal cytology (p=0.6; rho=-0.028), FIGO stage (p=0.2; rho=-0.080), lymph node involvement (p=0.2; rho=0.106) and patient age (p=0.5; rho=0.033). Longer duration of hysteroscopy (>15 min) was not associated with positive peritoneal cytology (yes vs. no, p=0.8), advanced tumour stage (FIGO I vs. II, III and IV, p=0.3), lymph node involvement (yes vs. no, p=0.1) and patient age (≤65 vs. >65 years, p=0.4). In a multivariate analysis, FIGO stage [p<0.0001; hazard ratio (HR)=5.1, 95% confidence interval (CI) 2.5-10.2], lymph node involvement (p=0.02; HR=3.2, 95% CI 1.2-8.8) and patient age (p=0.003; HR=2.4, 95% CI 1.3-4.2), but not duration of hysteroscopy (p=0.4; HR=1.2, 95% CI 0.7-2.2), were associated with recurrence-free survival. We conclude that longer duration of hysteroscopy does not increase the risk of positive peritoneal cytology and it is not an adverse prognostic factor for recurrence-free survival in patients with endometrial cancer.