The benign acute childhood myositis presents as a marked and painful oedema of leg muscles in the days following a viral illness. This disease is often considered as occurring only in children. We report the case of a 32-year-old patient who presented with severe pain and oedema of both legs associated with motor deficit of lower extremities. He suffered from a grippal syndrome for 4 days. Creatine kinase blood level rose up to 39 394 IU/L (n<200) and a muscle biopsy of left tibialis anterior found necrosisand regeneration of myocytes without inflammatory infiltrates. All clinical and paraclinical abnormalities spontaneously disappeared in a few days. This case illustrates that a disorder similar to benign acute childhood myositis may occur in adult patients. Muscle biopsy might be avoided in typical cases because of the favourable evolution.
- muscle disease
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Contributors J-BC participated to conception and design, acquisition of data and analysis, drafted the article and revised it critically for important intellectual content. CD participated to acquisition of data and analysis, revised the article critically for important intellectual content. BL participated to acquisition of data and analysis, drafted and revised the article critically for important intellectual content. AE-L participated to conception and design, acquisition of data and analysis, drafted and revised the article critically for important intellectual content. All authors approved the final version of the manuscript.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests J-BC reports hospitality fees from LFB Laboratory, Grifols and CSL Behring and speaker fees from CSL-Behring.
Patient consent Obtained.
Provenance and peer review Not commissioned; externally peer reviewed.