[Epidemic leg myalgia: a complication of influenza-like infections].

Following an influenza-like illness four patients developed severe pains in the calf muscles. All patients showed elevated levels of serum-creatinin-phosphokinase (CPK) and Coxsackie-B-virus-titers; with the exception of electromyographic abnormalities the other laboratory findings were normal. Because of the diagnosis, myalgia cruris epidemica, only symptomatic treatment was performed. Differential diagnostic and aetiological aspects are discussed.