The most common site of a benign (peptic) gastric ulcer is –
**Core Concept**
A peptic gastric ulcer is a type of mucosal defect in the stomach lining, resulting from an imbalance between the aggressive and protective factors in the stomach. The aggressive factors include gastric acid, pepsin, and bile salts, while the protective factors include mucus, bicarbonate, and prostaglandins.
**Why the Correct Answer is Right**
The most common site of a benign gastric ulcer is the lesser curvature of the stomach, particularly in the region known as the prepyloric antrum. This is due to the higher concentration of gastric acid and pepsin in this area, which can cause mucosal damage and ulceration. The prepyloric antrum is also a common site for Helicobacter pylori infection, which is a known risk factor for peptic ulcers.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the greater curvature of the stomach is less commonly affected by peptic ulcers.
**Option B:** This option is incorrect because the fundus of the stomach is not a typical site for peptic ulcers, as it has a thicker layer of mucus and less acid production.
**Option C:** This option is incorrect because the pyloric canal is not a common site for peptic ulcers, as it is protected by the pyloric sphincter and has a lower concentration of gastric acid.
**Clinical Pearl / High-Yield Fact**
The "clock face" method is a useful way to remember the common sites of peptic ulcers in the stomach: 2 o'clock for the lesser curvature, 10 o'clock for the angle of His, and 5 o'clock for the pyloric canal.
**Correct Answer:** C.