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
About Dandy-Walker syndrome, true is: 
Select and explain. 
A. Mostly have hydrocephalus, B. Cystic expansion of 4th ventricle, C. Mid cerebellar hypoplasia, D. All are true
D: All are true
Answer: D: All are true 
Explanation: d. All are true(Ref: Nelson's 20/e p 2815-2816)Dandy Walker malformationCystic expansion of 4th ventricle and midline cerebellar hypoplasia seen; 90% patients have hydrocephalusPapilledema, pyramidal tract signs and cranial nerve palsies may occur along with symptoms of raised ICP.It is managed by shunting the cystic cavity in the presence of hydrocephalus.