Endoscopic needle aspiration of a gastric duplication cyst.

Gastric duplication cysts are rare and generally asymptomatic in adults. They are usually discovered incidentally at upper gastrointestinal endoscopy or barium contrast radiography. We report here the case of a 41-year-old woman with a gastric submucosal mass, initially diagnosed as a leiomyoma that proved to be a gastric cyst. The cyst was aspirated under direct endoscopic vision using a standard sclerotherapy needle. To our knowledge, this is the first description of such a procedure.