This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Radiology
True about radiological features of Neurofibromatosis type 1 is all except: 
Select and explain. 
A. Dural ectasias, B. Empty orbit sign, C. Encephalotrigeminal angiomatosis, D. Superior rib notching
C: Encephalotrigeminal angiomatosis
Answer: C: Encephalotrigeminal angiomatosis 
Explanation: Ans. C. Encephalotrigeminal angiomatosisEncephalotrigeminal angiomatosis is synonymous with Sturge Weber syndrome, which is characterized by venous angiomas, Port wine stain and tram track gyral calcification in cerebrum.