Medium- and long-term outcomes of tunneled labial mucosa tube grafts for the repair of primary severe hypospadias and failed hypospadias.

Objective: This study aimed to evaluate the medium and long-term outcomes of tunneled labial mucosa tube graft urethroplasty in the treatment of primary severe hypospadias and failed hypospadias.

Methods: We retrospectively reviewed the medical records of the patients who underwent tunneled labial mucosa tube graft urethroplasty at a single center between 2007 and 2020. Data collected included patient demographic, operative and post-operative characteristics. The surgical procedure was performed in two stages. Binary logistic regression model was used to identify risk factors for postoperative complication.

Results: A total of 82 patients who were followed for at least 12 months were included in this study. Among these, 56 patients received primary repair, while 26 had previously undergone failed reconstruction. The mean age at surgery was 5.0 years. Postoperative urinary fistula occurred in 36 patients, with 24 requiring surgical repair and 12 resolving spontaneously. Urethral stricture developed in 26 patients, with 20 undergoing surgical intervention and 6 managed with urethral dilation. Preoperative surgical history was identified as an independent risk factor for postoperative complications (p=0.015).

Conclusions: Although the complication rate associated with tunneled labial mucosa tube graft urethroplasty is relatively high compared with other techniques, it remains a viable option for patients with insufficient replacement materials, particularly for primary severe hypospadias. For cases of failed hypospadias repair, this procedure should be considered selectively based on patient-specific factors.