CT findings of retinoblastoma

Authors retrospectively analyzed CT findings of 10 cases which proved retinoblastoma by pathology from May in 1983 to August in 1986 at Yeungnam University Hospital. The results obtained were as follows: 1. The age at time of diagnosis was 1-5 year old. 2. In 9 cases (9/10) reintroblastoma was unilateral. 3. Of all 10 cases, 8 cases revealed intraocular calcification. 4. At time of diagnosis of reintroblastoma, optic nerve involvement with or without intracranial extension were 2 cases. The diagnosis of retinoblastoma can be made clinically, but CT is valuable adjunct in differential diagnosis and management as well as diagnosis of retinoblastoma. In addition, orbital CT can be used to determine if there is retrobubar extension of retinoblastoma, involvement of CNS, and development of secondary orbital tumors.