Diagnosis: Compression of brain. Spinal stenosis in cervical regionClinical question: hx 4th ventriclar flow obstruction with Stenting tube placed eval CINE flow- eval patency of stent and CSF flowSigns and Symptoms: headaches to the base of the skull The CSF spaces are appropriate for the patient's stated age with no midline shift. The patient is status post posterior fossa decompression for Chiari I malformation. There is a ventricular stent present in the fourth ventricle which courses through the foramen of Magendie and behind the upper cervical cord. The appearance of the adjacent cerebellum is stable.The ventricles are non-dilated.CSF flow at the foramen Magnum is biphasic and within normal limits.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 are clear. The visualized portions of the mastoid air cells are clear. The visualized portions of the orbits are intact.
1.Status post Chiari I decompression and 4th ventricular stent without current evidence for ventriculomegaly. The findings are stable compared to the prior exam.2.CSF flow at the foramen Magnum is intact.