Ferrero, Kimberly, Silver, Mitchell, Cocchetto, Alan et al. · Journal of investigative medicine : the official publication of the American Federation for Clinical Research · 2017 · DOI
This study examines brain tissue from one person who had ME/CFS and died, looking for physical changes that might explain the illness. Researchers found several abnormalities in the brain including areas of damaged nerve fibers, tangles similar to those seen in Alzheimer's disease, and deposits of a protein called amyloid. These findings suggest that ME/CFS may involve damage to the brain's structure and deserve further investigation.
This is one of the rare neuropathological studies providing direct evidence of structural brain changes in ME/CFS, suggesting the disease involves measurable physical damage to the central nervous system rather than being purely functional. For patients, it validates that ME/CFS has biological basis; for researchers, it identifies specific pathological features to investigate further in larger populations and search for potential disease mechanisms.
This single autopsy case cannot establish that these pathological changes are universal to ME/CFS, present in living patients, or causative of the illness symptoms. It does not prove these abnormalities occur in all ME/CFS patients or determine whether similar changes develop in other conditions. The findings suggest potential involvement but do not establish incidence, prevalence, or the timeline of neuropathological development.