## **Core Concept**
Malignant ulcers of the stomach, typically associated with gastric cancer, have distinct characteristics that differentiate them from benign gastric ulcers. Understanding these features is crucial for diagnosis and management.

## **Why the Correct Answer is Right**
The correct answer, which is not provided in the query, would typically relate to a characteristic that does not align with known features of malignant gastric ulcers. Malignant ulcers are often associated with **irregular borders**, **heaping of edges**, and **non-uniform depth**. They are less likely to have a clean base and are more likely to cause gastric outlet obstruction or bleeding.

## **Why Each Wrong Option is Incorrect**
Without specific details on options A, B, C, and D, a general approach to evaluating incorrect statements about malignant ulcers of the stomach is as follows:

- **Option A:** If a statement claims that malignant ulcers have smooth, well-defined borders, it would be incorrect because malignant ulcers typically have irregular, ill-defined borders.
- **Option B:** If a statement suggests that malignant ulcers are usually benign in appearance but with a high risk of perforation, it would be incorrect because malignant ulcers often present with alarming features suggestive of malignancy.
- **Option C:** If a statement posits that malignant ulcers are commonly found in the antrum and are typically benign in nature, it would be incorrect because while some malignant ulcers are found in the antrum, their nature is malignant, not benign.
- **Option D:** If a statement indicates that malignant ulcers rarely cause complications like obstruction or bleeding, it would be incorrect because malignant ulcers can indeed cause significant complications, including gastric outlet obstruction and bleeding.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that any gastric ulcer that does not heal with standard treatment or has suspicious features on endoscopy (like irregular margins, ulcerated mass) should raise concern for malignancy. **Biopsy of the ulcer margins** is crucial for diagnosis.

## **Correct Answer: D. Typically heal with antacids.**