<unk>  is a rare disorder in which the tubes (ureters) that carry urine from the kidneys to the bladder are blocked by a mass in the area behind the stomach and intestines.
Retroperitoneal fibrosis
Retroperitoneal abscess
Misty mesentery
Perineal tear
Retroperitoneal hematoma
Accessory pancreas
Scrotal masses
Urogenital folds