 Sagittal T2 technique suggests the presence of a CSF intensity focus within the anterior right middle cranial fossa which is only partially characterized.The left cerebellar tonsil extends 6-7 mm below the level of the foramen magnum and demonstrates a pointed morphology with partial effacement of the posterior CSF space. There is also associated deformation of the leftward cervicomedullary junction secondary to the tonsillar herniation. There is a flash of biphasic CSF flow posteriorly at the level of the cerebellar tonsils. The odontoid tip is retroflexed abutting the cervicomedullary junction with mild deformation.A prominent syrinx is present within the cervical and thoracic spinal cord extending from the C4 level to the T12 level demonstrating multiple septations and measuring up to 8-9 mm in maximal AP dimension as well as 10-11 mm in maximal transverse dimension at several locations. The conus extends below L1 (below the field of view acquired for thoracic spine acquisition).There are no fractures, subluxations, or developmental osseous dysplasias.
1.Sagittal T2 technique suggests the presence of a CSF intensity focus within the anterior right middle cranial fossa which is only partially characterized. This may represent a partially imaged arachnoid cyst. Correlation with prior brain exams could help confirm.2.The left cerebellar tonsil extends 6-7 mm below the level of the foramen magnum and demonstrates a pointed morphology with partial effacement of the posterior CSF space consistent with Chiari I information. 3.A prominent syrinx is present within the cervical and thoracic spinal cord extending from the C4 level to the T12 level demonstrating multiple septations and measuring up to 8-9 mm in maximal AP dimension as well as 10-11 mm in maximal transverse dimension at several locations.