[Post-endoscopic retrograde cholangiopancreatography with descending abscess to knee level].

: In this case report, a 67-year-old woman underwent an endoscopic retrograde cholangiopancreatography (ERCP). The following day she was admitted to hospital due to abdominal pain. Blood tests showed amylase of 500 U/l and C-reactive protein of 300 mg/l, and suspicion of post-ERCP pancreatitis was raised. A CT scan of the abdomen showed signs of acute pancreatitis. After ten days the lower right leg started to swell. Deep venous thrombosis was ruled out, and a control CT-scan four weeks after admission showed abscesses in the right lower fossa and the lower right leg at knee level. Punctures had contents of amylase. Everything was interpreted as descending abscesses retroperitoneal from pancreas due to acute pancreatitis as an ERCP complication.