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Rippling Muscle Disease in Childhood

Department of Pediatrics, Ruhr-University Bochum, Bochum, Germany

Matthias Vorgerd, MD

Department of Neurology, Ruhr-University Bochum, Bochum, Germany

Nikola Popovic

Department of Neurology, Ruhr-University Bochum, Bochum, Germany

Benedikt G.H. Schoser, MD

Friedrich-Baur-Institut Ludwig-Maximilian University-Munich, Munich, Germany

Kenneth Ricker, MD

Department of Neurology University of Würzburg, Würzburg, Germany

Wilhelm Mortier, MD

Department of Pediatrics, Ruhr-University Bochum, Bochum, Germany

Rippling muscle disease is a rare autosomal dominant disorder first described in 1975. Recently, it could be classified as a caveolinopathy; in European families, mutations in the caveolin-3 gene were revealed as causing this disease. Although clinical symptoms were almost all described in adulthood, we are now reporting clinical data of seven children with rippling muscle disease owing to mutations in the caveolin-3 gene. Initial symptoms were frequent falls, inability to walk on heels, tiptoe walking with pain and a warm-up phenomenon, calf hypertrophy, and an elevated serum creatine kinase level. Percussion-/pressure-induced rapid contractions, painful muscle mounding, and rippling could be observed even in early childhood. The diagnosis can be confirmed by molecular genetic analysis. Muscle biopsy must be considered in patients without muscle weakness or mechanical hyperirritability to differentiate between rippling muscle disease and limb-girdle muscular dystrophy 1C. (J Child Neurol 2002;17:483-490).

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