All are X-ray findings of retinoblastoma except –: (A) Widening of optic canal, (B) Intra cerebral calcification, (C) Intraocular calcification, (D) Secondaries in cranial bones
Answer is B. 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.