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
ANCA positive vascuiltis is 
Select and explain. 
A. Henoch schonlein purpura, B. Behcet'S syndrome, C. Wegener's granulomatosis, D. None
C: Wegener's granulomatosis
Answer: C: Wegener's granulomatosis 
Explanation: Wegener granulomatosis is a necrotizing vasculitis characterized by a specific triad of findings: * Granulomas of the lung and/or the upper respiratory tract (ear, nose, sinuses, throat) * Vasculitis of small to medium-sized vessels (capillaries, venules, aerioles, and aeries), most prominently in the lungs and upper respiratory tract * Glomerulonephritis PR3-ANCAs are present in almost 95% of cases and probably drive the subsequent tissue injury; Robbins Basic pathology,9th edition,pg no.353