Inflammatory fibroid polyp

(A) Endoscopic view of an inflammatory fibroid polyp in the antrum showing a firm, well-circumscribed submucosal lesion.
(B) Histologically, a flattened, often eroded, gastric epithelium lines a compact aggregate of fibrous tissue mixed with inflammatory cells.
(C) Vessels usually are surrounded by a characteristic circumferential deposition of fibroblasts (onion skin), and the stroma contains myriad eosinophils.