This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
Puff of smoke appearance in cerebral angiography is a feature of 
Select and explain. 
A. Carotid artery thrombosis, B. Alexander disease, C. Moya moya disease, D. Krabbe's disease
C: Moya moya disease
Answer: C: Moya moya disease 
Explanation: Lenticulostriate arteries form a rich collateral network around occlusive lesion - puff of smoke.
Anterior circulation > posterior.