Chiari I malformation

Case contributed by Frank Gaillard
Diagnosis certain
  • Note: This case has been tagged as "legacy" as it no longer meets image preparation and/or other case publication guidelines.

Low lying cerebellar tonsils which extend below the margins of the foramen magnum by ~10mm and tightly embrace the medulla (best seen on axial imaging). There is no evidence of a syrinx or hydrocephalus. Features are consistent with an incidental Chiari 1 malformation.

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