[Gastric lipoma as an unusual cause of upper gastrointestinal bleeding].

This is a case report of a gastric lipoma causing a severe upper gastrointestinal bleeding. About 200 cases of this very rare benign gastric tumor have been reported so far. Symptoms are not characteristic, but may also mimic malignancy when occurring with bleeding, obstruction or weight loss. Malignant transformation is possible, but extremely rare. Because the tumor is situated under the submucosal layer in 90%, preoperative diagnosis by endoscopic biopsy is almost never possible. The tumor has to be treated by resection. A diagnosis by frozen section during the operation is recommended.