A case of pancreatic abscess associated with colonic fistula successfully treated by endoscopic transgastric drainage using a metallic stent.

A 64-year-old man, who had been treated conservatively for acute pancreatitis in another hospital 6 months previously, was admitted to our hospital with abdominal pain and fever. CT scan showed an air-containing fluid collection extending from the pancreatic tail to areas around the descending colon, leading to a diagnosis of pancreatic abscess associated with colonic fistula. We performed EUS-guided placement of a naso-cystic tube and an internal drainage tube stent, through which irrigation with saline was started. Because these tubes did not effectively relieve the symptoms, a covered EMS was placed to facilitate drainage to the stomach. Both the symptoms and signs of infection improved, and a contrast study confirmed disappearance of the abscess and closure of the fistula. He has been well without recurrence of the pancreatic abscess for half a year.