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 CSF? 
Select and explain. 
A. Germ cell tumors, B. Medulloblastoma, C. CNS Lymphoma, D. Craniopharyngoma
D: Craniopharyngoma
Answer: D: Craniopharyngoma 
Explanation: Answer is D (Craniopharyngioma): 'Ceain brain tumors such as medulloblastomas, primitive neurectodermal tumors, anaplastic ependymomas, choroid plexus carcinoma, pineoblastomas germ cell tumors and lymphomas may involve the CSF, leptomeningis of the brain or spinal cord'. Thus all tumors except craniophatyngiomas mentioned as options may involve CSF.