Most common intraocular tumour encroaching the orbit is :
Sphenoid wing meningioma
- Retinoblastoma can extend to the orbit Silent proptosis with the manifest intraocular tumor is the usual presentation.
- Proptosis with inflammation generally indicates reactive sterile orbital cellulitis secondary to intraocular tumor necrosis.
- The orbital spread of RB is classified as stage III RB under the Children Cancer Group classification of RB.