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
What is NOT a feature of Sturge Weber syndrome - 
Select and explain. 
A. Rail track appearance, B. Hemiatrophy of the brain, C. Convulsion, D. Empty sella
D: Empty sella
Answer: D: Empty sella 
Explanation: None