Extramammary Paget's disease of the vulva subclinically extending to the bladder neck: correct staging obtained with endoscopic urethral biopsy.

We report a 65-year-old woman with extramammary Paget's disease which recurred on the skin flap. We performed a mapping-biopsy of the urethra by ureteroscopy to select the appropriate treatment. This method is presumed to be useful for determining the margin, deciding the correct staging for extramammary Paget's disease and for making a judgement on appropriate therapy.