Clinical question: Is there Chiari malformation. Signs and symptoms: Dizzy, headache and syncope. Nonenhanced brain MRI:Negative diffusion weighted images.There is no evidence of Chiari malformation as is questioned clinically.There is normal anatomical development and morphology of the brain and with normal signal intensity on all MRI sequences.Unremarkable cerebral cortex, cortical sulci, ventricular system, CSF spaces and brain myelination.The signal void of major intracranial arterial branches are identified. The signal intensity of intracranial venous sinuses it is within normal.Unremarkable images through the orbits, paranasal sinuses and mastoid air cells.
Negative nonenhanced brain MRI.