Transcystostomal Bladder Tumor Resection in a Transgender Man After Phalloplasty

INTRODUCTION: Phalloplasty in transgender men is frequently complicated by a neourethral stricture, precluding standard transurethral access for bladder tumor resection. We describe the first reported case of a transcystostomal bladder tumor resection in a transgender man after a radial forearm free flap (RFFF) phalloplasty. MATERIALS AND SURGICAL TECHNIQUE: A 65-year-old transgender man, 23 years after an RFFF phalloplasty, presented with gross hematuria and a 15-mm posterior bladder tumor. A 7.95 Fr flexible ureteroscope reached the bladder but with markedly limited maneuverability. A two-stage transcystostomal approach was used: a 14 Fr suprapubic cystostomy (SPC) was placed 1 month before resection for tract maturation, followed by balloon dilation and insertion of a 24 Fr resectoscope. The modified Valdivia position enabled simultaneous transcystostomal and transurethral access with gravity-assisted irrigation drainage. Complete tumor resection was achieved without complications, and pathology confirmed noninvasive papillary urothelial carcinoma (pTa, low-grade) with negative margins. A single immediate intravesical instillation of pirarubicin was administered. Surveillance cystoscopy via the cystostomy tract at 3 and 6 months revealed no recurrence; the patient continues to void while standing with the cystostomy catheter capped. DISCUSSION: The two-stage transcystostomal approach, combining prior SPC placement, balloon tract dilation, and the modified Valdivia position, enabled safe oncological control while preserving phallic anatomy and standing voiding function. This technique offers a reproducible option for bladder tumor resection in patients with functionally inadequate transurethral access after phalloplasty.