The images show Vanek tumors of the duodenum (left) and the stomach (right) (Stomach photo by @patholwaker) Inflammatory fibroid polyps (IFP) or "Vanek tumors" are rare submucosal lesions arising from a reactive, benign granuloma-like process of the GI tract (1). This tumor is most commonly located in the stomach (70%), ileum (29%) and colon (6%) (2-4). Other locations such as esophagus, duodenum, ileum and gallbladder account each to 1% (1-3).