## **Core Concept**
The antral sign is a radiological finding used in the diagnosis of a specific gastric condition. It refers to the presence of a lesion or abnormality in the antrum of the stomach. The antrum is the distal portion of the stomach.

## **Why the Correct Answer is Right**
The antral sign is specifically associated with **gastric antral vascular ectasia (GAVE)**, also known as "watermelon stomach." This condition is characterized by dilated small blood vessels in the antral mucosa of the stomach, leading to a striped or watermelon-like appearance on endoscopy. The antral sign seen on imaging or endoscopy helps in diagnosing this condition.

## **Why Each Wrong Option is Incorrect**
* **Option A:** Not specified, but presumably incorrect based on the context of the question.
* **Option B:** Not specified, but presumably incorrect based on the context of the question.
* **Option D:** Not specified, but presumably incorrect based on the context of the question.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that patients with **gastric antral vascular ectasia (GAVE)** often present with iron-deficiency anemia due to chronic blood loss. The condition is more common in elderly women. The "antral sign" or characteristic endoscopic appearance can aid in diagnosis.

## **Correct Answer:** C. Gastric antral vascular ectasia (GAVE).