Which of the following features are associated with Irritable Bowel Syndrome:
**Core Concept**
Irritable Bowel Syndrome (IBS) is a functional gastrointestinal disorder characterized by chronic abdominal pain, changes in bowel habits, and the absence of organic disease. It is a diagnosis of exclusion, and its pathophysiology involves alterations in gut motility, hypersensitivity, and stress response.
**Why the Correct Answer is Right**
IBS is often associated with alterations in gut motility, leading to symptoms such as abdominal pain, bloating, and changes in bowel habits. The gut-brain axis plays a crucial role in the pathophysiology of IBS, with stress and anxiety exacerbating symptoms. The brain-gut axis involves the release of neurotransmitters such as serotonin, which regulates gut motility and secretions.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because IBS is not typically associated with inflammation, which is more characteristic of inflammatory bowel diseases such as Crohn's disease and ulcerative colitis.
**Option B:** This option is incorrect because IBS is not typically associated with the presence of blood in stool, which is more characteristic of conditions such as diverticulitis or angiodysplasia.
**Option C:** This option is incorrect because IBS is not typically associated with weight loss, which is more characteristic of conditions such as celiac disease or pancreatic insufficiency.
**Clinical Pearl / High-Yield Fact**
A key feature of IBS is the absence of organic disease, which is why it is a diagnosis of exclusion. The Rome IV criteria are used to diagnose IBS, and they include symptoms such as abdominal pain, changes in bowel habits, and the absence of alarm features.
**Correct Answer:** C. Abdominal pain and changes in bowel habits.