Radiological evaluation of orbital metastases, with emphasis on computed tomography.

Metastases to the orbit are found in the choroid, retrobulbar soft tissues, or bony orbit. Choroidal metastases result in retinal detachment and are best evaluated with fundoscopy and ultrasound. Retrobulbar metastases can involve both extraconal and intraconal spaces; they appear as masses having a high absorption value and irregular margins on plain CT scans and show slight contrast enhancement. The greater wing of the sphenoid is the most common site of bone metastases. These lesions often have soft-tissue components in both the lateral extraconal space of the orbit and the middle cranial fossa.