Bennett, R M · The Journal of rheumatology. Supplement · 1989
This article discusses how fibromyalgia syndrome can be confused with many other conditions, including chronic fatigue syndrome, because they share similar symptoms like pain and tiredness. When doctors misdiagnose fibromyalgia or take too long to identify it, patients may receive wrong treatments and become frustrated with their care. Understanding the differences between these conditions is important so patients get the correct diagnosis and appropriate help.
This work is relevant to ME/CFS patients because chronic fatigue syndrome is explicitly identified as a condition that can be confused with fibromyalgia, indicating substantial symptom overlap. Understanding how clinicians can distinguish between these conditions helps patients advocate for accurate diagnosis and appropriate treatment, avoiding unnecessary delays and misdirected therapy. The recognition of diagnostic confusion across multiple conditions underscores the broader clinical challenge of identifying post-viral and immune-mediated illnesses.
This editorial does not provide epidemiological data on how frequently fibromyalgia and ME/CFS are confused, nor does it establish causal relationships between conditions. It does not present diagnostic criteria, biomarkers, or systematic methods to differentiate these overlapping syndromes, serving instead as a clinical perspective rather than evidence-based guidance. The work reflects 1989 understanding and does not address more recent research on distinguishing features or pathophysiological differences.
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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