A 5-year-old girl had a "flu-like" syndrome followed five days later by clinical and pathologic evidence of myositis localized to both calves. Serum complement fixation titers were compatible with influenza A viral infection. The illness improved spontaneously within a week. Possible pathogenic mechanisms of postinfluenzal myositis and its clinical differences from idiopathic polymyositis are discussed.
Mejlszenkier JD, Safran AP, Healy JJ, Embree L, Ouellette EM. The Myositis of Influenza. Arch Neurol. 1973;29(6):441–443. doi:10.1001/archneur.1973.00490300103017
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