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
In a child with retinoblastoma, which of the following is NOT a common finding in the X-ray: September 2012 
Select and explain. 
A. Intraocular calcification, B. Intracerebral calcification, C. Multiple calcified mass in cranium, D. Widening of optic foramen
B: Intracerebral calcification
Answer: B: Intracerebral calcification 
Explanation: Ans. B i.e. lntracerebral calcification Retinoblastoma May be bilateral in 30-40% cases (paicularly familial ones), Knudsons hypothesis is related to Rb MC manifestation of Rb: Leukocoria/ Amaurotic cat's eye reflex Treatment of diffuse Rb: Enucleation (removal of eyeball with poion of optic nerve from orbit) Treatment of small Rb: Brachytherapy Treatment of bilateral Rb & metastatic disease: Chemotherapy