 The cerebellar tonsils are in appropriate position, without ectopia, demonstrating a normal rounded morphology. Sagittal CSF flow demonstrates biphasic flow anteriorly and posteriorly at the level of the foramen magnum and cerebellar tonsils.Brain MRI:The ventricles and sulci are normal in size. There are no masses, mass effect or midline shift. The pituitary gland is normal in size. There is no evidence for intracranial hemorrhage or acute cerebral, brainstem or cerebellar infarction. No diffusion-weighted abnormalities are identified. There are no extraaxial fluid collections or subdural hematomas. Flow voids are present within the major vessels indicating patency. The paranasal sinuses and mastoid air cells are clear. Complete spine MRI:Alignment is anatomic. There are no fractures or subluxations. There are no osseous dysplasias. The marrow signal is benign. The cord and conus are normal in signal characteristics and caliber throughout. The conus terminates at L1/2. The visualized intra-abdominal and paraspinal contents are unremarkable. No fat signal abnormality is noted within the filum terminale.
1.The cerebellar tonsils are in appropriate position, without ectopia, demonstrating a normal rounded morphology.2.Negative noncontrast MRI of the brain and complete spine.