Garland, E M, Robertson, D · The American journal of medicine · 2001 · DOI
Some people with ME/CFS and fibromyalgia have heard that a brain condition called Chiari I malformation might be causing their symptoms, especially dizziness and fainting when standing up. This editorial reviews whether that claim is actually supported by scientific research and concludes that there is very little reliable evidence backing up this connection, despite media coverage and patient discussions online.
This editorial is important because it addresses a treatment recommendation (decompression surgery for Chiari I malformation) that had gained traction among ME/CFS patients despite limited scientific support. By critically examining the evidence gap, it helps patients and clinicians make informed decisions about whether to pursue this intervention and highlights the risks of treating conditions based on anecdotal reports rather than rigorous research.
This editorial does not prove that Chiari I malformation never occurs in ME/CFS patients or that it never causes orthostatic intolerance in any individual. It also does not establish that decompression surgery is ineffective, only that the claimed connection lacks peer-reviewed scientific support. The absence of evidence in the literature is not the same as evidence of absence of a true biological relationship.
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →
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