Polypoid Cystitis Presenting as a Protruding Urethral Mass

Polypoid cystitis, presenting as a protruding urethral mass, is extremely rare. We present a 35-year-old woman with a sudden protruding urethral mass that was found after approximately 1 week of voiding difficulty. A cyst-like lesion around the urethra and thickening of the right posterior bladder wall were observed on a computed tomographic scan. Cystoscopy revealed that the protruding mass originated from the posterior wall of the urinary bladder and was connected by a stalk. Transurethral excision of the bladder mass was carried out, with polypoid cystitis diagnosed histopathologically.