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: Radiology
All are X-ray findings of retinoblastoma except – 
Select and explain. 
A. Widening of optic canal, B. Intra cerebral calcification, C. Intraocular calcification, D. Secondaries in cranial bones
B: Intra cerebral calcification
Answer: B: Intra cerebral calcification 
Explanation: Retinoblastoma is the most common cause of orbital calcification (nodular or punctate calcification & is favourable prognostic sign).
Enlargement of orbit & orbital canal occurs d/t involvement of optic nerve & intracranial extension.
Metastasizes to meninges, cranial bones, bone marrow, lung, liver, lymph node.