This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous System, Subject name: Pediatrics
A neonate with left to Right shunt & high cardiac output heart failure. CT Angiography of the neonate is shown. What is the diagnosis? 
Select and explain. 
A. Sagittal venous thrombosis, B. Vein of Galen malformation, C. Intracranial hemorrhage, D. Arnold-Chiari malformation
B: Vein of Galen malformation
Answer: B: Vein of Galen malformation 
Explanation: b. Vein of Galen malformationCT angiography shows enhancing rounded lesion at tentorial apex, extending posteriorly & draining into dilated superior sagittal sinus, through dilated straight sinus, suggestive of vein of Galen malformation.The anomaly is actually due to a cerebral arteriovenous fistula of the median prosencephalic vein (a precursor of the vein of Galen) occurring at 6-11 weeks gestation.