Based on the classification system developed by the Chapel Hill Consensus Conference, anti-neutrophil cytoplasmic antibody (ANCA) associated vasculitis is defined as a necrotizing vasculitis involving small vessels that is associated with myeloperoxidase (MPO) ANCA or proteinase 3 (PR3) ANCA and displays minimal immune deposits. The mechanism behind the pathogenesis of ANCA-associated vasculitis is not fully…
![Figure 2: Renal Biopsy](https://www.the-rheumatologist.org/wp-content/uploads/2018/08/THR_0818_pg33e-150x150.png)