Article Text
Objective
Our study’s primary aim was to compare the incidence of endometrial carcinoma in patients with a presurgical diagnosis of endometrial intraepithelial neoplasia confined to the endometrium (EIN-E) versus endometrial intraepithelial neoplasia confined to a polyp (EIN-P). Our secondary aim was to examine the difference in pathological features, prognostic risk groups and sentinel lymph node involvement between the two groups.
Methods We conducted a retrospective cohort study between January 2014 and December 2020 in a tertiary university-affiliated medical center. The study considered the characteristics of women who underwent hysterectomy with sentinel lymph node dissection for endometrial intraepithelial neoplasia (EIN). We compared EIN-E diagnosed by endometrial sampling via dilatation curettage or hysteroscopic curettage vs EIN-P. A multivariate logistic regression analysis was used to assess risk factors for endometrial cancer.
Results Eighty-eight women were included in the study, of those, 50 were women with EIN-P (EIN-P group) and 38 were women with EIN following an endometrial biopsy (EIN-E group).
The median age was 57.5 years (range; 52–68) in the EIN-P group as compared with 63 years (range; 53–71) in the EIN-E group (p=0.47). Eighty-nine percent of the women in the EIN-E group presented with abnormal uterine bleeding whereas 46% of the women in the EIN-P group were asymptomatic (p=0.001). Pathology results following hysterectomy revealed concurrent endometrial carcinoma in 26% of women in the EIN-P group compared with 47% of women in the EIN-E group (p=0.038). Multivariate analysis showed that endometrial cancer was significantly less common in the EIN-P group (overall response (OR)=0.3 95% confidence interval (CI)=0.1–0.9, p=0.03). Eighty-four percent of cancers were grade one in the EIN-P group compared with 50% in the EIN-E group (p=0.048).
Conclusions Concurrent endometrial cancer is less frequent with EIN-P than with EIN-E. The high incidence of endometrial carcinoma in both groups supports the current advice to perform hysterectomy for post-menopausal women. Our data does not support performing sentinel lymph node dissection for EIN-P that was completely resected. The benefit of sentinel lymph node dissection for women with pre-operative EIN-E is yet to be determined.
- Endometrial Hyperplasia
- Uterine Cancer
Data availability statement
Data are available upon reasonable request. All data relevant to the study are included in the article or uploaded as supplementary information.
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Data availability statement
Data are available upon reasonable request. All data relevant to the study are included in the article or uploaded as supplementary information.
Footnotes
Contributors The authors declare no potential conflict of interests. Each author listed on the manuscript has seen and approved the submission of this version of the manuscript and takes full responsibility for the manuscript. IL is the author acting as guarantor.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests All authors report no conflict of interest and that this research was non-funded.
Provenance and peer review Not commissioned; externally peer reviewed.