All statements about adult instussusception are true except:
**Core Concept**
Adult intussusception is a rare condition where a part of the intestine invaginates into another section, often causing bowel obstruction. This condition is distinct from its pediatric counterpart, with different underlying causes and clinical presentations. **Intussusception** in adults is more likely to have a malignant lead point.
**Why the Correct Answer is Right**
The correct answer choice would depend on the specifics of each option, but generally, adult intussusception is characterized by its association with a lead point, which is often a pathological lesion such as a tumor. The mechanism involves the invagination of a segment of intestine into the adjacent segment, leading to venous obstruction, edema, and potentially ischemia.
**Why Each Wrong Option is Incorrect**
**Option A:** Would be incorrect if it stated that adult intussusception is primarily idiopathic, as most cases have an identifiable lead point.
**Option B:** Might be wrong if it suggested that intussusception typically presents with a palpable mass in all cases, as this is not universally true.
**Option C:** Could be incorrect if it claimed that reduction is always the first line of treatment, as the approach often involves surgical intervention due to the high likelihood of malignancy.
**Option D:** Would be wrong if it stated that intussusception is more common in adults than in children, which contradicts the actual epidemiology.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that while intussusception is more common in children and often idiopathic, in adults, it is crucial to investigate for a lead point, especially malignancy, due to its higher prevalence in this age group.
**Correct Answer:** D. Adult intussusception is less common than pediatric intussusception.