This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Childhood Tumors, Subject name: Pediatrics
MC optic nerve tumor in children causing blindness: 
Select and explain. 
A. Glioma, B. Meningioma, C. Craniopharyngioma, D. Astrocytoma
A: Glioma
Answer: A: Glioma 
Explanation: a. Glioma(Ref: Nelson's 20/e p 3059, Ghai 8/e 612-613)High Yield Points about Optic GliomaOptic nerve glioma is the most frequent tumor of optic nerve in childhood; it is a benign hamartoma;Principal clinical manifestations are unilateral loss of vision, proptosis, deviation of the eye & optic atrophy