• I Takigami, K Miyamoto, H Kodama, H Hosoe, S Tanimoto, and K Shimizu.
• Department of Orthopaedic Surgery, Gifu University School of Medicine, Gifu City, 501-1194, Gifu, Japan.
• Spinal Cord. 2005 Apr 1; 43 (4): 249-51.

Study DesignReport of a rare case of an elderly patient with late onset of Arnold Chiari malformation type I with associated syringomyelia that was successfully treated with foramen magnum decompression.ObjectiveTo report this rare case along with a literature review.SettingGifu, Japan.MethodsA 69-year-old woman with a 4-year history of dull pain in her right arm was referred to the clinic. After physical and radiographical examinations, she was diagnosed with Arnold Chiari malformation type I with associated syringomyelia. A foramen magnum decompression by the removal of the outer layer of the dura mater was performed.ResultsAt 2 years postoperatively, MRI revealed a decrease in the size of the syringomyelia. Her symptoms had also remarkably improved.ConclusionsA rare case of symptomatic Arnold Chiari malformation type I with associated syringomyelia in an elderly woman was successfully treated with foramen magnum decompression by the removal of the outer layer of the dura mater.

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