Perrin, R, Embleton, K, Pentreath, V W et al. · The British journal of radiology · 2010 · DOI
This study used MRI brain scans to look for physical abnormalities in people with ME/CFS compared to healthy people. Eighteen patients with ME/CFS and nine healthy volunteers were scanned twice, one year apart. The researchers found no significant differences between the two groups in brain size, fluid levels, blood flow, or white matter lesions, and these measurements remained stable over the year.
This study is important because previous MRI research on ME/CFS has produced conflicting results. By using a longitudinal design with repeated imaging, it provides more robust evidence about whether structural or hemodynamic brain abnormalities are present, which has implications for understanding ME/CFS pathophysiology and whether brain imaging can serve as a diagnostic tool.
This study does not prove that ME/CFS has no neurobiological basis—it only shows that conventional MRI does not detect macroscopic brain abnormalities or gross hemodynamic changes. It does not exclude microscopic pathology, functional abnormalities detectable by other imaging modalities (PET, fMRI), or non-structural mechanisms of disease. The small sample size (especially 9 controls) limits generalizability.
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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