title: Gastric ulcer: benign or malignant?
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D011859:Radiography; D013272:Stomach Diseases / Q000000981:diagnostic imaging; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging*; D013276:Stomach Ulcer / Q000000981:diagnostic imaging*