Which of the following is only vascular disease with panarteritis where internal elastic lamina is preserved
**Core Concept**
The question requires knowledge of the histopathological characteristics of various vascular diseases, specifically those that involve panarteritis. Panarteritis refers to inflammation of the arterial wall, affecting all layers. The preservation of the internal elastic lamina is a crucial distinguishing feature of certain vascular diseases.
**Why the Correct Answer is Right**
The correct answer is Polyarteritis nodosa (PAN). PAN is a systemic vasculitis that affects medium-sized arteries, characterized by panarteritis without destruction of the internal elastic lamina. This is in contrast to other vasculitides like Kawasaki disease, where the internal elastic lamina is often destroyed. The pathophysiology of PAN involves immune complex deposition and activation of complement, leading to inflammation and damage to the arterial wall.
**Why Each Wrong Option is Incorrect**
* **Option A:** This is likely Kawasaki disease, which is characterized by inflammation of the arteries, including the internal elastic lamina. In Kawasaki disease, the internal elastic lamina is often destroyed.
* **Option B:** This option is not specified, but it could be a reference to Takayasu arteritis, which is a large vessel vasculitis that affects the aorta and its major branches. Takayasu arteritis typically involves destruction of the internal elastic lamina.
* **Option D:** This option is not specified, but it could be a reference to giant cell arteritis, which is a large vessel vasculitis that affects the temporal arteries and other branches of the carotid artery. Giant cell arteritis typically involves destruction of the internal elastic lamina.
**Clinical Pearl / High-Yield Fact**
The preservation of the internal elastic lamina is a key distinguishing feature of Polyarteritis nodosa (PAN) from other vasculitides.
**Correct Answer:** C. Polyarteritis nodosa (PAN).