Do gastric ulcer & stomach cancer look similar or different in endoscopy?

Can look similar: most gastric lesions arise along lesser curvature or cardio esophageal junctions as ulcers derived from helicobacter p. The lesion begins as a non healing lesion and if biopsied can show a portion of the ulcer wall with Ca. If allowed to progress, the ulcerating lesion will become a larger nodular or fungating lesion that presents with performation and or hemorrhage.

Simular: That's why biopsy is done for a pathologic diagnosis