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Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) Diagnostic Criteria
To determine which of your symptoms may be consistent with ME/CFS, you can consult the following diagnostic criteria:
International Consensus Criteria (ICC) - A comprehensive set of diagnostic criteria, based upon the older Canadian Consensus Criteria. It uses the term "Myalgic Encephalomyelitis" and discourages the use of the term "Chronic Fatigue Syndrome". It also uses the term "Post-Exertional Neuroimmune Exhaustion (PENE)" instead of the older term "Post-Exertional Malaise (PEM)".
Canadian Consensus Criteria (CCC) - An older, but still comprehensive, set of diagnostic criteria for ME/CFS, agreed upon by top ME/CFS specialists.
IOM/NAM Diagnostic Criteria (SEID) - A basic set of diagnostic criteria that is much less detailed than the ICC or CCC, but is easier to understand. It encourages use of the term "Systemic Exertion Intolerance Disease" or SEID, instead of ME/CFS.