 The cerebellar tonsils extend up to approximately 2 cm inferior to the foramen magnum. The craniocervical junction and cervical spine are otherwise incompletely characterized. There is a long segment thoracic syrinx that is most prominent between T5 and T8, where it measures up to 6 mm in width. The vertebral bone marrow signal is within the normal limits. The alignment of the vertebral bodies is normal. There is normal alignment of the lumbar vertebral bodies. The vertebral bone marrow signal appears normal. The conus medullaris is seen at the level of L1. The filum terminale appears normal. There is no evidence of spinal canal or neural foraminal stenosis. The paraspinal soft tissues are unremarkable.
1. The cerebellar tonsils extend up to approximately 2 cm inferior to the foramen magnum, which is compatible with Chiari malformation. The craniocervical junction and cervical spine are otherwise incompletely characterized.2. Long segment thoracic syrinx.