Valentine, A D, Meyers, C A · Cancer · 2001 · DOI
This review discusses how fatigue, brain fog, and depression are connected in cancer patients and how they may cause or worsen each other. The authors suggest that understanding these connections might help doctors develop better, more personalized treatments that address the specific needs of each patient.
This review is relevant to ME/CFS because it acknowledges that cognitive impairment, fatigue, and mood disturbance are multidimensional symptoms requiring integrated understanding across disease contexts. The authors' recommendation that interventions be patient-specific and biologically informed aligns with emerging approaches in ME/CFS research and treatment development.
This review does not establish causal mechanisms between fatigue, cognition, and mood—it identifies associations and proposes relationships that remain to be empirically tested. The conclusions are drawn from literature synthesis rather than original data, so individual claims require verification through rigorous prospective studies. Cancer-specific findings may not directly translate to ME/CFS populations, which have different underlying disease biology.
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 →
The first block is for the primary paper and is the citation you should use in research work. The atlas-snapshot line only applies if you are specifically referring to this atlas’s reading of the paper on the date shown.
Primary citation
Valentine, A D & Meyers, C A (2001). Cognitive and mood disturbance as causes and symptoms of fatigue in cancer patients.. Cancer. https://doi.org/10.1002/1097-0142(20010915)92:6+<1694::aid-cncr1499>3.0.co;2-s
BibTeX
@article{mecfsatlas-valentine-2001-cognitive-mood,
author = {Valentine, A D and Meyers, C A},
title = {Cognitive and mood disturbance as causes and symptoms of fatigue in cancer patients.},
journal = {Cancer},
year = {2001},
doi = {10.1002/1097-0142(20010915)92:6+<1694::aid-cncr1499>3.0.co;2-s},
note = {PubMed: 11598889},
url = {https://www.mecfsatlas.com/evidence/valentine-2001-cognitive-mood},
}Atlas snapshot reference
ME/CFS Atlas. Generator v1 / Scanner v1.4 / policy v0.1. Accessed 2026-05-30. https://www.mecfsatlas.com/evidence/valentine-2001-cognitive-mood
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