 There is an area of abnormal signal and enhancement in the left sphenoid portion of the skull base adjacent to the sphenoid sinus. This corresponds to a lucent area on prior 2011 PET/CT, on which there was no corresponding hypermetabolic lesion evident. No abnormal orbital mass or abnormal enhancement is seen. The optic nerves are normal in size and morphology, and are symmetric bilaterally. The extraocular muscles are unremarkable.
1. No orbital lesion or orother specific abnormality to account for the patient's symptoms. 2. Nonspecific left sphenoid bone marrow abnormality most likely present since 2011, not suspected to represent an aggressive process. If there is clinical concern, dedicated CT may be obtained to further assess the osseous features.