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
Small vessel vasculitis among the following is 
Select and explain. 
A. Takayasu disease, B. Temporal aeritis, C. PAN, D. Giant cell aeritis
C: PAN
Answer: C: PAN 
Explanation: Polyaeritis nodosa is a systemic vasculitis of small or medium sized muscular aeries that typically involves the renal and visceral vessels and spares the pulmonary circulation Robbins 9 th edition page no. 352