Transvaginal Diverticulum Wall Filling and Coverage Technique for Treating Female Circumferential Urethral Diverticulum

The goal of this clinical study is to learn if a new surgical technique called transvaginal diverticular wall filling and covering is effective and safe for treating circumferential urethral diverticulum (UD) in female patients. The main questions it aims to answer are: Does this technique reduce the risk of postoperative complications, such as fistula formation or stress urinary incontinence (SUI)? Does it improve urinary symptoms and sexual function? What are the recurrence rates after surgery using this approach? Researchers will follow two groups of patients: One group includes patients who had this surgery in the past 5 years (retrospective group). The other group includes patients who are newly treated with this technique and followed prospectively. Participants will: Undergo the transvaginal wall filling and covering surgery or conventional surgery. Have regular follow-up visits to assess symptoms, complications, and quality of life. Complete questionnaires about urinary and sexual function.