Vasculitis not commonly seen in adults-
**Core Concept**
Vasculitis refers to a group of disorders characterized by inflammation and damage to blood vessels. In adults, various forms of vasculitis can occur, but some are more common than others.
**Why the Correct Answer is Right**
Kawasaki disease is a rare, acute, and self-limiting vasculitis primarily affecting children, particularly those under the age of 5. It is characterized by fever, rash, lymphadenopathy, and mucous membrane changes, often accompanied by desquamation of the hands and feet. The exact cause of Kawasaki disease is unknown, but it is believed to involve an abnormal immune response to an infectious agent.
**Why Each Wrong Option is Incorrect**
**Option A:** Giant cell arteritis is a common form of vasculitis in adults, typically affecting the large and medium-sized vessels, particularly the temporal arteries.
**Option B:** Polyarteritis nodosa is another type of vasculitis that affects adults, characterized by necrotizing inflammation of medium-sized arteries.
**Option C:** Granulomatosis with polyangiitis (formerly known as Wegener's granulomatosis) is a form of vasculitis that primarily affects adults, causing inflammation of blood vessels and granulomatous inflammation of various organs.
**Clinical Pearl / High-Yield Fact**
Kawasaki disease is often associated with coronary artery aneurysms, which can occur in up to 25% of untreated cases, making early diagnosis and treatment crucial to prevent long-term cardiovascular complications.
**Correct Answer:** D. Kawasaki disease.