Duodenal Ulcer-Induced Gastric Outlet Obstruction Showing Pyloric Wall Thickening and Abnormal FDG Uptake Mimicking Malignancy.

Peptic ulcer disease is the most common benign cause of gastric outlet obstruction, in which mechanical obstruction occurs in the distal stomach, pylorus, or duodenum. We describe a case of gastric outlet obstruction induced by duodenal ulcer showing irregular pyloric wall thickening with marked enhancement on contras-enhanced CT and increased FDG uptake of the pyloric wall on FDG PET/CT mimicking malignancy.