“…Biloma occurs intrahepatic, intraperitoneal, or retroperitoneal, and most rarely within the retroperitoneum. 1 To date, the literature has published 10 cases, reporting retroperitoneal biloma due to spontaneous bile duct perforation, 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 with only one case due to left hepatic duct perforation. 11 Here, we report a case of retroperitoneal biloma due to left hepatic duct perforation, which required differentiation from perirenal abscess and urinary extravasation.…”