text: <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.
option_0: Retroperitoneal fibrosis
option_1: Retroperitoneal abscess
option_2: Misty mesentery
option_3: Perineal tear
option_4: Retroperitoneal hematoma
option_5: Accessory pancreas
option_6: Scrotal masses
option_7: Urogenital folds