All are features of irritable bowel syndrome except –
**Core Concept**
Irritable bowel syndrome (IBS) is a functional gastrointestinal disorder characterized by chronic abdominal pain, bloating, and alterations in bowel habits, such as diarrhea or constipation. The pathophysiology of IBS involves a complex interplay between visceral hypersensitivity, altered gut motility, and psychosocial factors.
**Why the Correct Answer is Right**
The correct answer is one that does not align with the typical presentation and diagnostic criteria of IBS. IBS is often diagnosed based on the presence of abdominal pain or discomfort, changes in bowel habits, and the absence of any structural or inflammatory changes in the gut. The Rome IV criteria, a widely accepted diagnostic framework, includes symptoms such as abdominal pain, bloating, and changes in bowel habits.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because abdominal pain is a hallmark symptom of IBS. Patients with IBS often report abdominal pain or discomfort, which can be relieved by defecation.
**Option B:** This option is incorrect because changes in bowel habits, such as diarrhea or constipation, are common in IBS. Patients may experience alternating episodes of diarrhea and constipation or persistent diarrhea or constipation.
**Option C:** This option is incorrect because bloating is a common symptom of IBS. Patients may report feeling bloated or uncomfortable in the abdomen.
**Clinical Pearl / High-Yield Fact**
A key feature of IBS is the absence of any structural or inflammatory changes in the gut, which can be confirmed through endoscopy or imaging studies. This distinction is essential for differentiating IBS from other gastrointestinal disorders.
**Correct Answer: None of the above. IBS is characterized by abdominal pain, changes in bowel habits, and bloating.**