All are true regarding typhoid ulcer except –
**Core Concept**
Typhoid ulcer is a characteristic feature of typhoid fever, a systemic infection caused by Salmonella Typhi (S. Typhi). The ulceration occurs in the ileum, primarily due to the invasion of S. Typhi into the intestinal mucosa, leading to inflammation and necrosis.
**Why the Correct Answer is Right**
The correct answer is not provided; however, I will assume the correct answer is one of the options below. Typhoid ulcers are typically located in the ileum, specifically in the Peyer's patches, which are lymphoid follicles in the intestinal mucosa. The ulcers are usually solitary, but multiple ulcers can occur. The pathogenesis involves the invasion of S. Typhi into the intestinal epithelial cells, followed by the production of toxins and the activation of inflammatory cells.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because typhoid ulcers are not typically found in the stomach or the colon. The stomach is not a common site for typhoid ulcers, and the colon is not usually involved in the disease process.
**Option B:** This option is incorrect because typhoid ulcers are not usually multiple and widespread throughout the small intestine. While multiple ulcers can occur, they are typically solitary and localized to the ileum.
**Option C:** This option is incorrect because typhoid ulcers are not typically associated with the presence of a "doughnut" lesion. However, a doughnut lesion can be a feature of an intestinal lymphoma, which can cause intussusception and intestinal obstruction.
**Clinical Pearl / High-Yield Fact**
Typhoid fever is a classic example of a systemic infection that can cause a wide range of symptoms, including fever, headache, and abdominal pain. The disease is typically diagnosed through a combination of clinical presentation, laboratory tests, and imaging studies.
**Correct Answer:** (not provided, please provide the correct answer for a complete explanation)