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: Medicine
Which of the following brain tumors does not spread via CSF - 
Select and explain. 
A. Germ cell tumors, B. Medulloblastoma, C. CNS lymphoma, D. Craniopharyngoma
D: Craniopharyngoma
Answer: D: Craniopharyngoma 
Explanation: None