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
Medusa head appearance on MRI is seen in 
Select and explain. 
A. AV malformation, B. Venous angioma, C. Cavernous hemangioma, D. Vein of galen malformation
B: Venous angioma
Answer: B: Venous angioma 
Explanation: Veins are small at periphery and gradually enlarge as they approach a central draining vein - caput medusa or medua head.
serpentine apperance of the curvilinear peripheral draining veins seen in venous malformation (venous angioma).