MR shows well defined lobulated homogeneous intraosseous cystic lesion in the lateral wall of the right orbit. The lesion is hypointense on T1WI and hyperintense on T2WI. The lesion shows restricted diffusion. There is an intraorbital extraconal extension with lateral rectus muscle compression and causing the proptosis. The lesion also extended to the temporalis fossa laterally. No intracranial extension. No enhancement after IV contrast administration (Postcontrast images not shown due to movement artifacts and suboptimal quality).
Findings most suggestive with orbital intradiploic epidermoid cyst.