[CT scan in 52 cases of retinoblastoma]

The results of CT scan in 52 patients (61 eyes) with retinoblastoma (Rb) managed and confirmed by clinical and pathological examination are reported. The features and value of imaging of CT scan are described and discussed. In this series, 96.72% of cases revealed Rb and 90.16% of the cases with Rb tumor showed evidence of calcification on CT scan. The contrast enhancement of the tumor was slight. 19.67% of the cases with Rb tumor showed retrobulbar extension and invaded intracranium (including 3 cases of intracranical tumor extension and one case of trilateral Rb). We think it is important to perform CT scan in suspected cases of Rb, and in patients with Rb invading the orbit or intracranium as well as in bilateral Rb. Some problems in the diagnosis and differential diagnosis are briefly discussed.