Authors stress that complications in laparotomic and laparoscopic extrahepatic biliary surgery aren't exceptional. Lesions could be due to section or to stenosis of biliary duct. We can distinguish: intraoperative lesions, which consist in a intraperitoneal bile groan that needs an immediate treatment; lesions that could be found in postoperative period and in any case many days after surgery. Among this complications there is biloma, i.e. a localized uncapsulated extraductal bile collection. Authors refer about their experience and describe clinical findings of this complication. They conclude affirming how biloma treatment doesn't require always resurgery or CT scan drain. Main biliary tract endoscopic decompression could be often useful.