There is a large expansile left orbital mass that measures 5.1 x 4.6 x 5.1 cm (TRV, CC, AP) without intracranial extension. The mass demonstrates predominantly T1 hyperintense signal with areas of interspersed linear T1 hypointense signal. There are foci of mineralization as well as fully formed long bones within the mass.
The globe is displaced ventrally and is flattened along its posterior margin. The left optic nerve courses within the superior and medial aspect of the left orbit, and is hypoplastic when compared to the right. The extraocular muscles are not identified with certainty. The lacrimal gland is also not well delineated. The left orbital roof is intact, without evidence of dehiscence.
The right orbit and globe is within normal limits.