This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Surgery
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: Ans. (d) Empty sellaRef: Bailey 261 e p 599Sturge weber syndrome:* Sporadic usually* Large cutaneous angioma unilaterally (Port wine stain)* Brain angiomas* Focal seizures typically opposite to side of lesion* Adrenal Pheochromocytoma* Cortical atrophy.* Angiomas can be seen "Rail road" or "Tram track" calcification in Occipital region.