Chronic relapsing myalgia (? Post viral): clinical, histological, and biochemical studies.
Byrne, E, Trounce, I, Dennett, X · Australian and New Zealand journal of medicine · 1985 · DOI
Quick Summary
This study examined two patients with ongoing muscle pain that started after a viral-like illness and came and went unpredictably. Doctors found the patients had weak muscle fibers and signs that their muscles weren't producing energy as efficiently as they should. The findings suggest these patients may have a mild form of ME/CFS, and importantly, their muscle problems were real biological issues rather than caused by psychological factors.
Why It Matters
This early study provided objective biochemical evidence that ME/CFS-like illness involves measurable mitochondrial dysfunction, helping establish that the condition has a biological basis rather than being primarily psychological. For patients, this research supports the legitimacy of their symptoms and guides clinicians toward appropriate medical investigation rather than dismissing symptoms as psychosomatic.
Observed Findings
Non-specific Type II muscle fiber atrophy on histological examination
Mild depression of State 3 mitochondrial respiration with Complex I substrates
Mild depression of State 3 mitochondrial respiration with Complex II substrates
Variable muscle tenderness on deep palpation with otherwise normal neuromuscular examination
Onset of persistent myalgia following an ill-defined systemic illness with marked symptom fluctuations
Inferred Conclusions
The patients may represent a mild form of myalgic encephalomyelitis (ME/CFS)
Muscle pain in these cases has an organic biological basis involving mitochondrial dysfunction, not a psychogenic origin
Mitochondrial respiratory chain impairment may be implicated in post-viral myalgic conditions
Differentiation of organic myalgia from psychogenic pain is clinically important and can be supported by objective testing
Remaining Questions
How prevalent are mitochondrial respiratory defects across larger ME/CFS patient populations?
Are the observed Type II fiber atrophy and mitochondrial changes primary pathogenic mechanisms or secondary consequences of illness?
What This Study Does Not Prove
As a two-patient case series from 1985, this study cannot establish how common mitochondrial abnormalities are in ME/CFS populations or whether the observed changes are primary causes or secondary effects of illness. The small sample size and lack of control group data limit generalizability, and modern techniques would provide more detailed mitochondrial analysis than polarography alone.
Tags
Symptom:PainFatigue
Biomarker:Metabolomics
Phenotype:Infection-Triggered
Method Flag:PEM Not DefinedWeak Case DefinitionNo ControlsSmall SampleExploratory Only