This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pathology
All of the following conditions are associated with raised ANCA except 
Select and explain. 
A. Wegener granulomatosus, B. Polyaeritis nodosa, C. Microscopic poly angitis, D. Churg strauss syndrome
B: Polyaeritis nodosa
Answer: B: Polyaeritis nodosa 
Explanation: Classification of vasculitis Large vessel vasculitis *Giant cell (temporal) aeritis - seen in >50yrs of age*Takayasu aeritis - seen in <50yrs of age Medium vessel vasculitis *Polyaeritis nodosa - necrotizing inflammation of renal vessels. Spares pulmonary vessels. *Kawasaki disease - seen in <5yrs of age Small vessel vasculitis *Wegener granulomatosis -positive for c-ANCA(Ab against proteinase 3)*Churg strauss and microscopic polyangitis - positive for p-ANCA (Ab against myeloperoxidase) (Ref: Robbins 8/e p511)