What are the differences between gastric cancer and gastric ulcer?

Gastric cancer and gastric ulcers differ in several aspects: 1. Nature of the lesion: Gastric ulcers are benign lesions of the gastric mucosa, while gastric cancer involves malignant transformation of gastric mucosal cells. 2. Symptoms: Gastric ulcers commonly present with postprandial abdominal pain, acid reflux, and belching, whereas gastric cancer may present with additional symptoms such as hematemesis, melena, weight loss, and fatigue, along with abdominal pain. 3. Diagnostic findings: Under gastroscopy, gastric ulcers typically appear as small, well-defined lesions with smooth margins, while gastric cancer often presents as irregular, crater-like ulcers with friable tissue that bleeds easily. 4. Treatment approaches: Gastric ulcers are usually treated medically with medications, while gastric cancer may require a comprehensive treatment approach including surgery, chemotherapy, and/or radiation therapy. 5. Prognosis: Gastric ulcers generally have a favorable prognosis with appropriate treatment, while the prognosis for gastric cancer varies significantly depending on the type and stage, with an overall poorer outcome.