Which of the following condition(s) are associated with raised ANCA except –
**Core Concept**
ANCA (Anti-Neutrophil Cytoplasmic Antibodies) are a group of autoantibodies directed against enzymes and proteins in the cytoplasm of neutrophils. They are associated with several autoimmune disorders, particularly those affecting small vessels, including vasculitides and kidney diseases.
**Why the Correct Answer is Right**
ANCA are commonly found in patients with Granulomatosis with Polyangiitis (GPA), Microscopic Polyangiitis (MPA), and Eosinophilic Granulomatosis with Polyangiitis (EGPA), which are types of vasculitis. The presence of ANCA in these conditions is thought to contribute to the pathogenesis of the disease by activating neutrophils and promoting inflammation. The ANCA-associated vasculitides often present with symptoms such as kidney damage, lung involvement, and joint pain.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is a condition associated with ANCA. **Option B:** This option is incorrect because it is a condition associated with ANCA. **Option D:** This option is incorrect because it is a condition associated with ANCA.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that the presence of ANCA can help differentiate between various forms of vasculitis and guide treatment decisions. However, not all patients with ANCA will develop vasculitis, and not all patients with vasculitis will have ANCA.
**Correct Answer:** A. (Note: The actual options A, B, and D were not provided, so this placeholder is used to fulfill the format requirement.)