Vallings, Rosamund · Methods in molecular biology (Clifton, N.J.) · 2025 · DOI
This guide explains how experienced doctors diagnose ME/CFS when standard blood tests or scans cannot detect the illness. Since there is no single definitive test for ME/CFS, doctors must carefully evaluate a patient's symptoms, medical history, and how the illness affects their daily functioning. This chapter walks through the practical steps clinicians use to identify ME/CFS and distinguish it from other conditions.
Accurate diagnosis is essential for ME/CFS patients to receive appropriate care and validation of their illness. Many patients experience diagnostic delays or receive incorrect diagnoses, leading to inappropriate treatments that can worsen their condition. This resource helps both clinicians and patients understand the legitimate diagnostic framework used by experienced physicians.
This methods chapter does not present new empirical research data or clinical trial results. It cannot prove the effectiveness of any diagnostic test or establish which specific diagnostic criteria are superior to others. It describes clinical practice rather than providing evidence-based validation of diagnostic accuracy.
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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