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Choroidal osteoma

This is a very rare tumour consisting of bone within the eye, usually next to the optic nerve. Although benign, it can cause loss of vision when the fovea is involved by the tumour or by haemorrhages from new vessels arising from the margins of the tumour.

 

osteoma224

Choroidal osteoma adjacent to the optic disc. On ultrasonography, the tumour shows high acoustic reflectivity and casts a long shadow into the orbit.

 

Treatment

Photodynamic therapy - to arrest growth before the tumour reaches the fovea and to induce regression of choroidal new vessels

Anti-angiogenic agents - to induce regression of choroidal new vessels