Following are features of ischaemic colitis except –
**Core Concept**
Ischaemic colitis is a condition characterized by temporary or permanent damage to the colonic mucosa due to inadequate blood flow, leading to various clinical manifestations. It can result from decreased blood flow to the colon, which may be caused by systemic conditions, vascular diseases, or mechanical factors.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology and clinical presentation of ischaemic colitis. Ischaemic colitis typically presents with abdominal pain, bloody stools, and a change in bowel habits. The condition can be acute or chronic and may be caused by various factors such as hypotension, vasculitis, or mechanical obstruction. The mucosal damage in ischaemic colitis can lead to transient or permanent changes in the colonic mucosa, resulting in symptoms such as abdominal pain, diarrhoea, and bleeding.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option describes a potential cause of ischaemic colitis, which is a systemic condition that can lead to decreased blood flow to the colon. Therefore, it is not an exception.
* **Option B:** This option describes a potential symptom of ischaemic colitis, which is a common clinical presentation of the condition. Therefore, it is not an exception.
* **Option C:** This option describes a potential complication of ischaemic colitis, which can occur in severe cases of the condition. Therefore, it is not an exception.
**Clinical Pearl / High-Yield Fact**
A classic examination question about ischaemic colitis is to identify the correct cause of the condition. One high-yield fact to remember is that ischaemic colitis is often caused by systemic conditions that lead to decreased blood flow to the colon, such as hypotension, vasculitis, or mechanical obstruction.
**Correct Answer: D.