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Peptic ulcer disease

If the ulcer crater is very shallow, a thin layer of barium coating results in a ring shadow. Irregular folds merging into a mound of polypoid tissue around the crater suggest a malignancy. Fundal ulcers above the level of the cardia are usually malignant.

Imaging Findings :
Classic signs of benignancy include penetration, Hampton line, ulcer collar, ulcer mound, and radiation of smooth, slender mucosal folds to the edge of the crater.

Fold patterns in gastric ulcers (arrow). (A) Small, slender folds radiating to the edge of a benign ulcer. (B) Thick folds radiating to an irregular mound of tissue surrounding a malignant gastric ulcer (arrow).