Hakariya, Yukiko, Kuratsune, Hirohiko · Nihon rinsho. Japanese journal of clinical medicine · 2007
This review examined blood test abnormalities in ME/CFS patients. While standard blood tests often appear normal in CFS patients despite their many symptoms, specialized blood tests have found problems in the systems that control stress, hormones, and immune function. The authors suggest that ME/CFS may result from brain dysfunction caused by immune chemicals called cytokines or antibodies that attack the body's own cells.
This review is important because it provides a framework for understanding why ME/CFS patients feel severely ill despite normal standard blood tests. It highlights that specialized testing may reveal the biological basis of symptoms, which could lead to better diagnostic approaches and targeted treatments for this debilitating condition.
This review does not prove that any single cytokine or autoantibody causes ME/CFS, nor does it establish the direction of causality between immune abnormalities and brain dysfunction. It cannot determine whether observed blood abnormalities are primary causes, secondary consequences, or markers of the disease. The review's evidence base and specific mechanisms remain to be validated by subsequent prospective studies.
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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