Differences between gastric cancer and duodenal ulcer

The main differences between gastric cancer and duodenal ulcer are as follows: 1. **Nature of the disease**: Gastric cancer is a malignant tumor occurring in the stomach, whereas a duodenal ulcer is an inflammatory defect in the duodenal mucosa and is considered a benign condition. 2. **Causes**: Gastric cancer is often associated with Helicobacter pylori infection, long-term smoking, and excessive alcohol consumption; duodenal ulcers may be related to excessive gastric acid secretion, Helicobacter pylori infection, and weakened defense mechanisms of the duodenal mucosa. 3. **Symptoms**: Patients with gastric cancer may experience symptoms such as abdominal pain, weight loss, loss of appetite, hematemesis (vomiting blood), and melena (black tarry stools); patients with duodenal ulcers commonly present with recurrent episodes of upper abdominal pain, which may be accompanied by symptoms such as acid reflux and belching. 4. **Treatment approaches**: Gastric cancer typically requires surgical removal of the tumor, often combined with radiotherapy and chemotherapy; duodenal ulcers can usually be treated with medications and lifestyle modifications.