This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Peripheral Arterial Occlusive Disease, Subject name: Surgery
Buerger disease affects which layers of artery? 
Select and explain. 
A. Tunica media, B. Tunica adventitia, C. Tunica intima, D. All of above
D: All of above
Answer: D: All of above 
Explanation: Ans. (d) All of aboveRef: Bailey & Love 26th ed. / 899-900* Acute-phase lesions have inflammation involving all coats of the vessel wall, especially of the veins, in association with occlusive thrombosis.* Intermediate phase is characterized by progressive organization of the occlusive thrombus in the arteries and veins.* Chronic phase or end-stage lesion is characterized by organization of the occlusive thrombus with extensive recanalization and prominent vascularization of the media.* In all three phases, the normal architecture of the vessel wall subjacent to the occlusive thrombus and including the internal elastic lamina remains essentially intact.