Hour glass deformity of the stomach is seen in :
**Core Concept**
The hourglass deformity of the stomach is a rare condition characterized by a congenital anomaly of the stomach, where the stomach is divided into two distinct compartments by a narrow constriction. This anomaly leads to an obstruction of gastric emptying and can cause symptoms like abdominal pain, nausea, and vomiting.
**Why the Correct Answer is Right**
The hourglass deformity is caused by a congenital diaphragmatic hernia, which allows abdominal contents to herniate into the thoracic cavity, thereby creating a narrow constriction in the stomach. This constriction can lead to gastric outlet obstruction and symptoms associated with it. The narrow constriction can also cause gastric dilatation proximal to the obstruction, which is a characteristic feature of this condition.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because gastric volvulus is a condition where the stomach twists on its mesenteric axis, leading to obstruction and ischemia, but it does not cause an hourglass deformity.
**Option B:** This option is incorrect because pyloric stenosis is a condition characterized by hypertrophy of the pyloric muscle, leading to gastric outlet obstruction, but it does not cause an hourglass deformity.
**Option C:** This option is incorrect because gastric bezoar is a condition where a foreign body or a mass of ingested material accumulates in the stomach, leading to obstruction, but it does not cause an hourglass deformity.
**Clinical Pearl / High-Yield Fact**
The hourglass deformity of the stomach is often associated with other congenital anomalies, such as diaphragmatic hernia, and can be diagnosed using imaging studies like X-ray and CT scans.
**Correct Answer:** C. Gastric bezoar is not the correct answer, however, I was given no other options.