 MRI Brain: Cerebellar tonsils are ectopic with inferior displacement of the tonsils by approximately 6 mm below the foramen magnum. There is minimal if any crowding of the CSF spaces at the foramen magnum. There is preserved bidirectional pulsatile CSF flow ventral and dorsal to the cord.FLAIR images are motion degraded but demonstrate no significant signal abnormality in the brain. Stable 8 mm pineal cyst is again seen. The ventricles and sulci are within normal limits. The basal cisterns remain patent. There is no midline shift or mass effect. There are no areas of abnormal signal. No extra-axial fluid collection is identified. Normal flow-voids are demonstrated in the major intracranial vascular structures. There is minimal mucosal thickening involving the maxillary sinuses with small mucous retention cysts. MRI Cervical spine: The cervical cord is normal in caliber and signal. There is no evidence of syrinx. Vertebral bodies are well aligned. There is no neural foraminal or spinal canal narrowing. Alignment of the vertebral bodies is unremarkable. There is mild straightening of the cervical spine which may positional in nature. The paravertebral tissues are unremarkable.
1.Stable mild cerebellar tonsillar ectopia/Chiari 1 malformation. CSF spaces and bidirectional CSF flow at the foramen magnum are preserved. No evidence of syrinx in the cervical cord.2.Stable small cystic lesion in the pineal gland.