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: Surgery
[{'content': 'Which of the following are also called as "Ghost cell tumors"? \nSelect and explain. \nA. Medulloblastoma, B. Acoustic neuroma, C. Primary CNS lymphoma, D. Glioblastoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Primary CNS lymphomas are also called as "Ghost cell tumors" as they show quick resolution after initiation of steroids.', 'role': 'assistant'}]