Lower lip weakness. There is no evidence of intracranial hemorrhage or acute infarct. There is an eccentric right pineal cyst that measures up to 18 mm, with flattening of the adjacent right thalamus. The brain parenchyma otherwise appears unremarkable. There is no abnormal intracranial enhancement. The ventricles are normal in size and configuration. However, the cerebellar tonsils a low-lying, extending up to 7 mm inferior to the foramen magnum, and have a pointed 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. Eccentric right pineal cyst measures up to 18 mm, with flattening of the adjacent right thalamus. 2. The cerebellar tonsils a low-lying, extending up to 7 mm inferior to the foramen magnum, and have a pointed configuration, which may represent Chiari 1 malformation.