[Chronic fatigue syndrome: the point of view of the internist].
Cogan, E · Revue medicale de Bruxelles · 2002
Quick Summary
This review examines how doctors approach patients with chronic fatigue. The authors note that most chronic fatigue cases stem from psychiatric conditions like depression and anxiety. A small group of patients have ME/CFS, which involves fatigue, mood and thinking problems, and various other physical symptoms—but doctors still don't know what causes it. Current treatments with limited evidence include antidepressants, talk therapy, and graded exercise programs.
Why It Matters
This review highlights the clinical challenge of diagnosing ME/CFS and the limited treatment options available, emphasizing that the condition remains poorly understood despite affecting a distinct patient population. Understanding the distinction between psychiatric fatigue, idiopathic chronic fatigue, and ME/CFS helps patients and clinicians recognize that ME/CFS is a specific condition worthy of targeted research and clinical attention.
Observed Findings
Psychiatric causes account for more than 80% of chronic fatigue cases in primary care
30% of patients with chronic fatigue remain without a specific diagnosis after known causes are excluded
ME/CFS represents a small subset of the chronic fatigue population and is characterized by fatigue, neuropsychiatric symptoms, and various somatic complaints
Most treatments for ME/CFS are ineffective
Antidepressant medications, cognitive behavioral therapy, and graded exercise appear to be the only interventions with some evidence base
Inferred Conclusions
ME/CFS is a distinct heterogeneous disorder separate from the broader chronic fatigue population and primary psychiatric causes
The etiology of ME/CFS remains unknown, limiting the development of targeted treatments
Current evidence-based approaches are limited to supportive care, psychotherapy, and structured exercise programs
Most pharmacological interventions lack demonstrated effectiveness for ME/CFS
Remaining Questions
What is the underlying biological or pathophysiological cause of ME/CFS?
What This Study Does Not Prove
This review does not establish the cause of ME/CFS or prove that psychiatric conditions cause ME/CFS—it simply notes that psychiatric issues are common in broader fatigue populations. The review does not provide rigorous evidence comparing the effectiveness of different treatments, nor does it establish that CBT and graded exercise are universally effective for ME/CFS patients. It reflects 2002 perspectives and does not address more recent research on potential biological mechanisms.
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 →