Female, 47 years old, with history of acinic cell parotid cancer status post CRT. Findings are demonstrated compatible with prior right mastoidectomy and parotidectomy, without significant interval change.Again seen is marrow replacement with corresponding patchy heterogeneous enhancement involving the right basiocciput, petrous ridge, condylar and squamous portions of the occipital bone, and the right lateral mass of C1. Findings have not significantly changed, and no new skull base osseous lesions are suspected. As on prior examinations, abnormal enhancing tissue abuts the right ICA and appears to encase the jugular foramen.Intracranially, no new or suspicious lesions are seen. Two or three small foci of enhancement within the right lateral cerebellum, immediately adjacent to the lesional bone, are seen with associated FLAIR hyperintensity. These findings are not significantly changed when compared to numerous prior examinations dating back several years and are favored to represent treatment effect.Supratentorially, several scattered foci of nonspecific FLAIR hyperintensity are redemonstrated without significant interval change. No new enhancing lesions are seen. No significant edema or mass effect is detected. The ventricles remain normal in size and morphology.
Stable findings are seen related to metastatic involvement of the right central and posterior skull base and the right craniocervical junction. No new lesions are detected.