A rare case of duodenum perforation after biliary stenting under endoscopic retrograde cholangiopancreatography: a case report.

Duodenal injury under endoscopic retrograde cholangiopancreatography (ERCP) is extremely rare. This study describes a case of duodenum perforation after biliary stenting under ERCP for the first time. A 67-year-old female patient was transferred to the emergency department of First Hospital of China Medical University after experiencing whole abdominal pain for 6 hours. The patient had received a biliary stent placement under ERCP at an outer hospital 6 days previously due to duodenal papillary occupy. During the operation, a small perforation caused by a biliary stent was found at the lateral side of the duodenum, but no biliary stent was found. Duodenal juice was flowing out from the perforation, Then, the perforation was opened obliquely, and an 8-cm portion of the biliary stent was removed. Gastrostomy, jejunostomy, and choledochotomy T-tube drainage procedures were subsequently performed. The patient recovered well and was discharged with the T-tube and the jejunal nutrition tube after 20 days. Four types of perforation under ERCP have been reported in previous literature, and this case report documents a rare complication from biliary stenting under ERCP. This case is different from the previous four types and can be called type V, which give general endoscopic doctors a serious warning.