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 is not seen in neuroimaging of patient of tuberous sclerosis? 
Select and explain. 
A. White matter lesion, B. Ependymoma, C. Subependymal nodules, D. Giant cell astrocytoma
B: Ependymoma
Answer: B: Ependymoma 
Explanation: None