E3 PreliminaryPreliminaryPEM unclearReview-NarrativePeer-reviewedMachine draft
Commonalities in the Features of Cancer and Chronic Fatigue Syndrome (CFS): Evidence for Stress-Induced Phenotype Instability?
Rusin, Andrej, Seymour, Colin, Cocchetto, Alan et al. · International journal of molecular sciences · 2022 · DOI
Quick Summary
This review compares ME/CFS with cancer-related fatigue, two conditions that share similar exhaustion symptoms. The authors examined research showing that both conditions may involve problems with stress hormones, immune system inflammation, energy production in cells, and genetic factors. They suggest these two different diseases might actually represent different points on a spectrum of how the body responds to stress, rather than being completely separate conditions.
Why It Matters
Understanding shared biological mechanisms between CFS/ME and cancer-related fatigue could identify common biomarkers for diagnosis and treatment targets, potentially accelerating therapeutic development for ME/CFS. This comparative framework challenges the traditional siloing of these conditions and may help explain the symptom severity and heterogeneity observed in ME/CFS populations.
Observed Findings
- Both CFS/ME and cancer-related fatigue show evidence of HPA-axis dysfunction affecting stress hormone regulation
- Both conditions demonstrate abnormalities in serotonergic neurotransmission
- Elevated inflammatory cytokines and immune dysfunction are documented in both syndromes
- Mitochondrial dysfunction and metabolic insufficiency appear in both CFS/ME and cancer-related fatigue
- Genetic predispositions may influence individual susceptibility and phenotypic expression in both conditions
Inferred Conclusions
- CFS/ME and cancer-related fatigue may occupy different positions on a biological continuum of stress-induced responses rather than representing entirely distinct diseases
- Common biomarkers may exist between CFS/ME and cancer-related fatigue that could aid diagnosis and treatment development
- Genetic background and other predisposing factors likely determine how individuals manifest fatigue in response to various stressors
- Future research should prioritize identifying shared biological markers between these two heterogeneous syndromes
Remaining Questions
- What specific biomarkers are truly shared between CFS/ME and cancer-related fatigue, and can they be validated in prospective studies?
What This Study Does Not Prove
This review does not prove that CFS/ME and cancer-related fatigue are the same disease or even that they share identical biological causes. It is a narrative review synthesizing existing literature rather than presenting new experimental evidence, and the proposed stress-response continuum remains a hypothesis requiring prospective clinical validation.
Tags
Symptom:Fatigue
Biomarker:CytokinesGene ExpressionBlood Biomarker
Method Flag:Exploratory Only
Metadata
- DOI
- 10.3390/ijms23020691
- PMID
- 35054876
- Review status
- Machine draft
- Evidence level
- Early hypothesis, preprint, editorial, or weak support
- Last updated
- 10 April 2026
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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