This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vasculitic Disorders in Children, Subject name: Pediatrics
Which is not a characteristic of Wegener's granulomatosis: 
Select and explain. 
A. Granuloma in vessel wall, B. Focal necrotising glomerulonephritis, C. Positive for cANCA, D. Involves large vessels
D: Involves large vessels
Answer: D: Involves large vessels 
Explanation: Wegener's granulomatosis involves small vessels