Can a spinal tap tell anything about chiari? my neuro doesn't seem worried but i feel like it's slowly killing me. can hardly swallow food anymore

Chiari: Chiari malformations are defects in the cerebellum, part of the brain controlling balance. Cerebellum and the brain stem sit in an indented space at the lower rear of the skull, above the foramen magnum and when part of the cerebellum is located below this it is called a Chiari malformation. Usually diagnosed with imaging studies there is no need for a spinal tap unless you have hydrocephalus