7 months baby diagnosed as retinoblastoma on MRI shows T1 hyperintensity , T2 low signal with regions of low signals on all sequences ( calcium) & multicentricity or bilaterality with subretinal fluid and intense and heterogenous enhancement including in the anterior eye segment / choroidal involvement / extension along the optic nerve on the right. There is no intracranial extension / no pineal region SOL with ‘J’ shaped sella.
Teaching points by Dr MGK Murthy, Mr Venkat, Mr Abdul Hamid:
1. Retinoblastoma is a most common pediatric intra ocular neoplasm.
2. MRI plays a role in differentiating from leukocoria.
3. Multicentric origin / anterior eye enhancement / choroidal involvement / subretinal fluid / scleral / extrascleral involvement / extension along the optic nerves / intracranial extension are well demonstrated on MR.
4. It also helps to exclude trilaterality in the pineal region and also exclude associated malignancies.
5. MR has a role in studying of implants post enucleation including fibrovascular growth.