Which of the following structures are involved in Buerger’s disease?
**Core Concept**
Buerger's disease, also known as thromboangiitis obliterans, is a rare **vascular disorder** characterized by inflammation and thrombosis of small and medium-sized **arteries** and **veins**. This condition primarily affects the **lower limbs**, leading to **ischemia** and potentially **gangrene**.
**Why the Correct Answer is Right**
The correct answer involves **small and medium-sized arteries and veins**, as Buerger's disease is known to affect these structures, leading to **inflammation** and **thrombosis**. The **pathophysiology** involves an **immune-mediated response**, resulting in **vasculitis**.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specifically involve the small and medium-sized arteries and veins.
**Option B:** Similarly, this option is incorrect as it does not accurately represent the structures involved in Buerger's disease.
**Option D:** This option is also incorrect as it does not involve the characteristic small and medium-sized arteries and veins affected by the disease.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that Buerger's disease is strongly associated with **smoking**, and **cessation** is a crucial part of management.
**Correct Answer:** D. Small and medium-sized arteries and veins.