Skip lesions are feature of –
**Core Concept**
Skip lesions refer to discontinuous, patchy areas of inflammation in the gastrointestinal tract. They are a hallmark histopathological feature of **Crohn’s disease**, distinguishing it from other inflammatory bowel diseases like ulcerative colitis.
**Why the Correct Answer is Right**
Crohn’s disease causes transmural inflammation that affects any part of the GI tract, from mouth to anus. The term "skip lesions" describes non-contiguous, alternating segments of healthy and inflamed tissue. This is due to the chronic, granulomatous immune response targeting the mucosa and submucosa, leading to focal damage rather than continuous ulceration. In contrast, ulcerative colitis involves continuous mucosal inflammation limited to the colon.
**Why Each Wrong Option is Incorrect**
**Option A:** Ulcerative colitis does not exhibit skip lesions; inflammation is continuous and confined to the colon.
**Option B:** Celiac disease presents with villous atrophy in the small intestine, not skip lesions.
**Option C:** Whipple’s disease involves PAS-positive macrophages in the lamina propria, not discontinuous inflammation.
**Clinical Pearl / High-Yield Fact**
Remember: **"Crohn’s = Skip, UC = Continuous."** This distinction is critical for diagnosis and management. Skip lesions are rarely seen in other GI conditions, making them a high-yield exam topic.
**Correct Answer: C. Crohn’s disease**