Chronic fatigue syndrome and eating disorders: concurrence or coincidence?
Fisher, Martin, Krilov, Leonard R, Ovadia, Marc · International journal of adolescent medicine and health · 2002 · DOI
Quick Summary
This study looked at four adolescent patients who had both an eating disorder and ME/CFS at the same time. In all four cases, the eating disorder appeared first, followed later by ME/CFS symptoms. The authors explored whether these two conditions might be related through common causes, whether an eating disorder could trigger ME/CFS, or whether they simply occurred together by chance.
Why It Matters
This study highlights an important and underexplored comorbidity pattern in adolescents with ME/CFS. Understanding potential connections between eating disorders and ME/CFS could improve clinical recognition and treatment approaches for patients presenting with both conditions, particularly given the shared cardiovascular and psychological features identified.
Observed Findings
All four patients presented with an eating disorder before developing CFS symptoms
Both eating disorders and CFS share overlapping features: diagnostic difficulties, cardiovascular effects, cultural/psychological influences, and demographic similarities
Two patients initially sought evaluation for eating disorders and were later diagnosed with CFS
Two patients initially sought evaluation for CFS and were later diagnosed with eating disorders
Inferred Conclusions
Eating disorder and CFS comorbidity may occur more frequently in adolescents than previously recognized
Potential mechanisms linking the two conditions may include vascular instability exacerbated by eating disorder-related malnutrition
Overlapping etiologies or shared predisposing factors may increase risk for developing both disorders in some adolescents
Management of these comorbid conditions requires awareness of shared clinical features and diagnostic challenges
Remaining Questions
How common is this comorbidity in the broader adolescent ME/CFS population?
What specific biological mechanisms might link eating disorder-induced nutritional deficiency or metabolic stress to ME/CFS development?
What This Study Does Not Prove
This small case series cannot establish whether eating disorders cause ME/CFS, are merely coincidental, or share common underlying causes. The temporal sequence observed does not prove causation, and findings from four cases cannot be generalized to the broader ME/CFS or eating disorder populations. No control group comparison means we cannot determine if this comorbidity occurs more frequently than expected by chance.
Tags
Symptom:Orthostatic IntoleranceFatigue
Phenotype:Pediatric
Method Flag:Weak Case DefinitionNo ControlsSmall SampleExploratory Only