## Core Concept
Typhoid ulcers are complications of typhoid fever, caused by *Salmonella Typhi* infection. These ulcers occur due to the invasion of the intestinal wall by the bacteria, leading to necrosis and subsequent ulceration. The pathophysiology involves the bacteria's entry into the bloodstream, followed by their invasion of Peyer's patches in the intestine.

## Why the Correct Answer is Right
The correct answer, ., relates to a characteristic that is not typically associated with typhoid ulcers. To determine this, let's analyze each option in relation to known facts about typhoid ulcers.

## Why Each Wrong Option is Incorrect
- **Option A:** Typically, typhoid ulcers are known to be solitary, often found in the ileum, and are associated with complications like intestinal perforation. If option A describes a characteristic commonly found in typhoid ulcers, it would be incorrect as an "EXCEPT" option.
- **Option B:** If option B accurately describes a feature of typhoid ulcers, such as their usual location or the nature of the ulcer, it would not be the correct answer to the "EXCEPT" question.
- **Option C:** Similar to options A and B, if C describes a known aspect of typhoid ulcers, it would not be the correct answer.

## Clinical Pearl / High-Yield Fact
A key point to remember is that typhoid ulcers are most commonly associated with the ileum, particularly involving Peyer's patches. A classic clinical correlation is that these ulcers can lead to severe complications, such as intestinal perforation, which is a significant cause of morbidity and mortality in untreated or late-treated typhoid fever.

## Correct Answer: D.