Nuchal/occipital headache. The cerebellar tonsils appear to have gradually diminished inferior extension, measuring up to 5 mm, previously 7 mm in 2014 and 9 mm in 2013, but maintain mildly pointed configurations. There is no evidence of intracranial hemorrhage, mass, or acute infarct. The brain parenchyma appears unremarkable. The pineal region cerebrospinal fluid spaces appear unchanged. The ventricles and basal cisterns are normal in size and configuration. There is no midline shift. The major cerebral flow voids are intact. The orbits, skull, paranasal sinuses, and scalp soft tissues are grossly unremarkable.
1. The cerebellar tonsils appear to have gradually diminished inferior extension, measuring up to 5 mm, previously 7 mm in 2014 and 9 mm in 2013, but maintain mildly pointed configurations. 2. Unchanged appearance of the pineal region cerebrospinal fluid spaces.