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
[{'content': 'What is not a feature of Sturge-Weber syndrome? \nSelect and explain. \nA. Rail track appearance, B. Hemiatrophy of the brain, C. Convulsion, D. Empty sella', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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.', 'role': 'assistant'}]