37 years Female (DOB:6/18/1979)Reason: f/u Chiari malformation History: dizzy and headachePROVIDER/ATTENDING NAME: JAMES X. TAO SERVICES ANCILLARY The CSF spaces are appropriate for the patient's stated age with no midline shift. The cerebellar tonsils extend below the level of foramen magnum extend approximately 5 mm below the level of foramen magnum. There is no associated ventriculomegaly.No abnormal mass lesions are appreciated intracranially. No intracranial hemorrhage is identified. No edema is identified within the brain parenchyma.Normal vascular flow voids are present in the distal carotid and vertebral arteries, the basilar artery and the proximal anterior, middle and posterior cerebral arteries as well as the internal cerebral veins and superior sagittal sinus.The visualized portions of the paranasal sinuses demonstrate mucous retention cysts in the left maxillary sinus. The visualized portions of the mastoid air cells are clear. The visualized portions of the orbits are intact.CSF flow study demonstrates biphasic flow ventrally.
The cerebellar tonsils are low lying suggestive of Chiari I malformation, however there is no significant CSF flow obstruction at the foramen magnum appreciated.