Solitary fibrous tumor of the left maxillary sinus and orbit, status post partial resection. There is no significant interval change in size of the mass centered within the left orbit with extension into the adjacent paranasal sinuses, premaxillary space, and masticator space. Overall, the tumor measures approximately 45 mm in width, 50 mm in height, and 40 mm in length. However, the tumor has grown gradually since June 2015, at which time it measured up to approximately 45 mm in greatest dimension. There is marked left proptosis and compression of the optic nerves and most of the extraocular muscles, with relative sparing of the superior rectus. There are postoperative findings in the left maxillary sinus, with moderate mucosal thickening. The right orbit is unremarkable. There is no evidence of intracranial extension of tumor. There is a subcentimeter cystic lesion in the left superficial parotid tumor.
No appreciable interval change in size of the solitary fibrous tumor involving the left orbit with extension into the adjacent paranasal sinuses, premaxillary space, and masticator space. However, the tumor has grown gradually since June 2015. 