Conclusion
In this retrospective case series, patients on fertility sparing treatment for early EC who underwent BS were associated with early cancer regression within six months. In addition, patients had significant weight loss and resolution of comorbidities. BS could be a promising component of fertility sparing treatment for early EC. The overall and metabolic health benefits from weight loss induced by BS in this study is consistent with current literature. Larger scale, prospective case controlled studies with longer follow-up period is required to confirm the oncological benefit of BS for this purpose. This study could add to the body of evidence and raise awareness for this promising treatment strategy, while forming the background data for future prospective studies.