Endometrial stripe thickness: a preoperative marker to identify patients with endometrial intraepithelial neoplasia who may benefit from sentinel lymph node mapping and biopsy.

Objectives: The goal of our study was to identify preoperative factors in patients with endometrial intraepithelial neoplasia that are associated with concurrent endometrial cancer to select patients who may benefit from sentinel lymph node (SLN) assessment at the time of hysterectomy.

Methods: Retrospective single institution cohort study of patients with a preoperative diagnosis of endometrial intraepithelial neoplasia who underwent hysterectomy with or without staging from January 2010 to July 2020. Modified Poisson regression was used to calculate risk ratios (RR) and 95% confidence intervals (CI).