Drago, F, Romagnoli, M, Loi, A et al. · Archives of dermatology · 1992
This case study describes a single patient with ME/CFS who developed an unusual, long-lasting skin rash called erythema multiforme that didn't respond to standard steroid treatment. Researchers found evidence of Epstein-Barr virus (EBV)—the virus that causes infectious mononucleosis—in the skin lesions and other body tissues. The rash improved when the patient was treated with an antiviral medication (acyclovir), but returned when the medication was stopped.
This is the first case to provide direct evidence that EBV may play a causative role in erythema multiforme, a rare skin condition. For ME/CFS patients, this finding supports the hypothesis that persistent EBV infection and aberrant immune responses may contribute to some of the systemic manifestations seen in ME/CFS, potentially opening new avenues for antiviral treatment approaches.
This single case report cannot establish that EBV causes erythema multiforme in ME/CFS patients generally—it only demonstrates one patient's response. The study does not prove that abnormal EBV antibodies are responsible for ME/CFS itself, nor does it show how common this particular skin manifestation is in ME/CFS populations. Case reports generate hypotheses but cannot prove causation or determine prevalence.
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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