Endoscopic submucosal dissection of a rare antral mass: gastric fibrolipoma.

A 60-year-old man was hospitalized with upper abdominal pain for 2-month duration. He had no previous history of symptoms related to his upper gastrointestinal tract. Physical examination was unremarkable. A semicircular round mass with smooth surface was found at the gastric antrum measuring 2.0 × 2.0-cm by gastroscopy. Endoscopic ultrasound (EUS) demonstrated a heterogeneous hyperechoic mass originated from the submucosal layer. Abdominal computed tomography (CT) revealed a fat-density mass with internal mixed density at the gastric antrum. His complete blood test, liver, renal, coagulation function and tumor markers were within reference values. Endoscopic submucosal dissection (ESD) was performed. Postoperative histopathology examination revealed the tumor was composed of closely arranged proliferating mature adipocytes with consistent size and shape. Collagen fiber hyperplasia between adipocytes was found in focal area. The patient was diagnosed as gastric fibrolipoma. He was discharged home uneventful and no symptoms was found in 12 months follow-up.