An unusual complication after percutaneous drainage of a pancreatic pseudocyst into the stomach.

In the period between September 1995 and June 1999, we performed percutaneous drainage into the stomach in 12 patients. There were no complications or pseudocyst recurrences on insertion or after endoscopic removal of the catheter, which was left in site for 1 year on average. After endoscopic removal of the drainage catheter, one of the patients presented with a cystic formation in the stomach wall, which caused stomach emptying disorder. Therefore, the patient had to be reoperated. The cyst wall was incised and a part of the cystic wall sampled for histological examination. The cyst was then drained into the isolated Roux loop of the jejunum. Histological findings of the cystic wall specimen showed the presence of granulation tissue and smooth muscle layers with ganglia cells of myenteric nerve plexus. Despite this complication, we believe that percutaneous endoscopically and ultrasonographically guided drainage of pancreatic pseudocyst into the stomach by means of a double pigtail catheter is a good method that yields encouraging results in sonographically selected cases. The position of the drainage catheter needs to be checked endoscopically, and the catheter should be removed only after 1 year.