Clinical question: Dizziness. Signs and symptoms: Dizziness. Nonenhanced head CT:No detectable activity intracranial process.There is evidence of ectopia of cerebellar tonsils through the foramen magnum of approximately 3 mm. There is resultant partial effacement of subarachnoid space at the level of foramen magnumRecommend follow-up with MRI exam.Unremarkable cerebral cortex, cortical sulci, ventricular system and gray -- white matter differentiation.Unremarkable calvarium and soft tissues of the scalp.Unremarkable orbits mastoid air cells and paranasal sinuses.
Mild ectopia of cerebellar tonsils and unremarkable study otherwise. Follow-up with MRI and CSF flow study is recommended