Extramammary Paget's disease of the glans penis secondary to urethral recurrence of bladder carcinoma after radical cystectomy: A case report.

Using immunostaining, the differential diagnosis between primary and secondary extramammary Paget's disease is more accurate. Secondary extramammary Paget's disease should be considered when a skin lesion is present on the penis of patients with urothelial carcinoma.