[Overview of chronic fatigue syndrome focusing on prevalence and diagnostic criteria].
Kuratsune, Hirohiko · Nihon rinsho. Japanese journal of clinical medicine · 2007
Quick Summary
This review examines ME/CFS as a real medical condition affecting the nervous system, immune system, and stress response. While researchers have found many different abnormalities in ME/CFS patients—including viral reactivation, immune problems, and chemical imbalances in the brain—no single cause has been identified in everyone with the condition. The authors suggest that ME/CFS likely results from a combination of genetic factors and life stress that disrupts how the body's immune and hormone systems work together.
Why It Matters
This review provides an important synthesis linking immune dysfunction, hormonal abnormalities, and brain changes in ME/CFS, which helps validate the condition as biologically real rather than purely psychological. Understanding ME/CFS as a multisystem disorder involving neuro-immune-endocrine pathways can shift clinical perspectives and encourage investigation of mechanism-based treatments rather than dismissing patients' symptoms.
Observed Findings
Multiple distinct abnormalities reported across ME/CFS populations including viral reactivation, immune dysfunction, HPA axis abnormalities, and metabolic changes
No single abnormality is common to the majority of ME/CFS cases
Cytokine dysregulation appears associated with secondary brain dysfunction in ME/CFS
Psychosocial stress and genetic factors are implicated in disease pathogenesis
Medical skepticism about ME/CFS persists despite accumulating biological evidence
Inferred Conclusions
ME/CFS should be understood as a biologically-based condition involving neuro-endocrine-immune system dysfunction rather than a purely psychological disorder
Viral reactivation and immune abnormalities in ME/CFS likely result from upstream dysregulation of stress-response and immune-regulatory systems
Genetic predisposition combined with psychosocial stress creates vulnerability to developing ME/CFS
The heterogeneity of biochemical findings suggests ME/CFS may represent a common clinical phenotype with multiple underlying biological pathways
Remaining Questions
What are the specific genetic factors that increase ME/CFS susceptibility?
What This Study Does Not Prove
This review does not establish a single definitive cause for ME/CFS, nor does it prove causation versus correlation for any proposed mechanism. The article does not provide new primary data or clinical trial evidence; it synthesizes existing literature and cannot determine which abnormalities are primary drivers versus secondary consequences of the illness.
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 →