The artery that is spared in polyarteritis nodosa? – Medicine MCQ

The artery that is spared in polyarteritis nodosa?
A. Bronchial artery
B. Renal artery
C. Coronary artery
D. Pulmonary artery

Correct answer : D. Pulmonary artery

Nodular thickened coronary vessels in polyarteritis nodosa. Abundant adipose tissue is also visible.

• Polyarteritis nodosa is a mulisystem , necrotizing vasculitis of small and medium sized muscular arteries.
• It is characterised by the involvement of renal and visceral arteries.
• Pulmonary arteries are not involved in PAN, although rarely bronchial vessels may be involved.

Ref : Harrison’s principles of Internal Medicine 19 th edition, Chapter 385, page 2187
Image credits: A. Kussmaul, R. Maier. https://en.wikipedia.org/wiki/File:Kussmaul_Maier_Makro.jpg