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: Ophthalmology
The most common tumor that spread to orbit from intracranial cavity is 
Select and explain. 
A. Gliomas, B. Pituitary tumors, C. Neurofibroma, D. Sphenoid wing meningioma
D: Sphenoid wing meningioma
Answer: D: Sphenoid wing meningioma 
Explanation: Sphenoid wing meningiomas are slow growing tumors that originate from outer arachnoid meningeal epithelial cells.