68-year-old male with history HNC and CRT, compare to previous measurements. History of RT to the left orbit. There is susceptibility artifact related to patient dental hardware which somewhat limits examination. Posttreatment findings are again seen in the left supraciliary region. There is persistent enhancement along the left superolateral orbital wall and extraconal space extending superiorly through the frontal bone coursing medially adjacent to the left frontal sinus, not appreciably changed when compared to 1/5/2016 and 10/7/2015. Enhancing tissue also extends to the left frontal dura margin as before. No new mass lesions or areas of abnormal enhancement are noted to suggest tumor progression. Lytic osseous defect is better seen on recent CT. The right orbit is unremarkable. There is partial opacification of the bilateral ethmoid sinuses as well as a mucus retention cyst in the left maxillary sinus.
Posttreatment changes in the left supraciliary region with unchanged nonspecific enhancing tissue at the site of the treated squamous cell carcinoma. 