Paramesonephric (müllerian) sinus of urinary bladder.
D000328:Adult; D002828:Choristoma / Q000175:diagnosis / Q000473:pathology*; D005260:Female; D006801:Humans; D009095:Mullerian Ducts; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis / Q000473:pathology*