Serous tubal intraepithelial carcinoma (STIC), a potential precursor of high-grade serous carcinoma, is associated with subsequent carcinomas development. This study aimed to identify cases of STIC and serous tubal intraepithelial lesions (STIL) and examine clinical outcomes and patterns of care in This retrospective study was conducted at six institutions to examine patients with isolated STIC/STIL. Demographic, adjuvant treatment, and follow-up data were collected from the date of implementation of Sectioning and Extensively Examining the Fimbriated end protocol, which varied from 2006 to 2015, until December 2022. We analyzed the data of 1,119 women who underwent RRSO and were carriers of While patient monitoring after STIC/STIL detection may be considered due to the minimal risk of carcinoma, excessive concern may not be necessary. Furthermore, adjuvant chemotherapy should be considered only with caution.