CT
CT is a secondary imaging modality relative to MRI for the evaluation of
an ocular mass lesion. CT only remains superior in documenting the
presence of calcifications, which is an important imaging feature of
retinoblastoma. Such determination is however rarely needed as
ophthalmologic and MRI features are typically diagnostic of
retinoblastoma. The evaluation of optic nerve involvement and
intracranial extension on CT is significantly limited compared to MRI.