Which of the following is the least common possibility about Angiodysplasia of colon?
**Core Concept**
Angiodysplasia of the colon is a vascular lesion characterized by ectatic, thin-walled blood vessels in the submucosa and mucosa of the colon, often associated with aging, hypertension, and atherosclerosis. These lesions can lead to gastrointestinal bleeding due to the rupture of the fragile vessels.
**Why the Correct Answer is Right**
The correct option is typically the one that is less frequently associated with Angiodysplasia of the colon. In most cases, Angiodysplasia is not related to **inflammatory bowel disease** (such as Crohn's disease or ulcerative colitis). The pathogenesis of Angiodysplasia is thought to involve chronic hypertension, atherosclerosis, and genetic predisposition, which are distinct from the inflammatory processes involved in IBD.
**Why Each Wrong Option is Incorrect**
* **Option A:** Inflammatory bowel disease (IBD) can be associated with Angiodysplasia, particularly in younger patients, although it is less common. However, it's not the least common possibility.
* **Option B:** Bleeding from Angiodysplasia can be intermittent and may be self-limited, but it is not the least common possibility about Angiodysplasia.
* **Option C:** Hypertension is a known risk factor for Angiodysplasia, and it's not the least common possibility.
**Clinical Pearl / High-Yield Fact**
Angiodysplasia of the colon often presents with occult or overt rectal bleeding, and it is essential to consider this diagnosis in older adults with unexplained gastrointestinal bleeding, particularly if they have a history of hypertension or atherosclerosis.
**Correct Answer: D. Inflammatory bowel disease**