All are angiographic findings of Thromboangitis obliterans except
**Core Concept**
Thromboangitis obliterans, also known as Buerger's disease, is a non-atherosclerotic, segmental inflammatory disease of the blood vessels, primarily affecting the small and medium-sized arteries and veins of the limbs. The disease leads to thrombosis, inflammation, and eventual occlusion of the affected vessels.
**Why the Correct Answer is Right**
The characteristic angiographic findings of Thromboangitis obliterans include beading of the vessels, which is due to the formation of small, discrete aneurysms or ectasias, and occlusions of the vessels. These occlusions can occur at multiple levels, leading to a "corkscrew" or "beaded" appearance of the affected vessels on angiography. The disease also causes segmental narrowing of the vessels, which can lead to complete occlusion.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a characteristic finding of Thromboangitis obliterans. Beading of the vessels is a hallmark feature of the disease.
**Option B:** This option is incorrect because it is not a specific finding of Thromboangitis obliterans. While segmental narrowing can occur in various vascular diseases, it is not a distinctive feature of Buerger's disease.
**Option C:** This option is incorrect because it is a characteristic finding of Thromboangitis obliterans. Occlusions of the vessels are a common feature of the disease.
**Clinical Pearl / High-Yield Fact**
It is essential to note that Thromboangitis obliterans is often associated with smoking, and patients with this disease often have a strong smoking history. This association is so strong that the disease is often referred to as "smoker's disease."
**Correct Answer: A. Beading of the vessels is not a characteristic finding of Thromboangitis obliterans (it is actually a characteristic finding).**