Synchronous melanosis of upper and lower urinary tract

Ahmad N. Alzubaidi, Stephen Sekoulopoulos, Alexander Birk, Jonathan T. Pham, Erik Washburn, John J. Knoedler

Research output: Contribution to journalArticlepeer-review


Urothelial melanosis is an exceptionally rare diagnosis, with less than 25 cases being reported in the literature. Melanosis of the urothelium is characterized by abnormal melanin deposition within tissues, producing a black, velvety appearance to the urothelial mucosa. We present a 67-year-old male undergoing cystoscopy during a routine percutaneous nephrolithotomy (PCNL), who was found to have diffuse bladder melanosis extending up the ureter and into the renal pelvis. To our knowledge, this is the first reported case of synchronous melanosis of upper and lower urinary tract.

Original languageEnglish (US)
Article number102309
JournalUrology Case Reports
StatePublished - Jan 2023

All Science Journal Classification (ASJC) codes

  • Urology


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