Bedside Diagnosis of Rippling Muscle Disease in Cav3 P.A46T Mutation Carriers

Research output: Contribution to journalArticle

Abstract

Thirty-nine members, ages 1 to 67 years, of a Swedish family with rippling muscle disease (RMD) were investigated to assess genotype phenotype correlations. Clinical, neurophysiological, and muscle morphological examinations were performed. Genetic analysis was performed in 38 individuals. Twenty-three patients had percussion-induced muscle mounding (PIMM) and percussion-induced rapid contractions (PIRC). Rippling and hyperCKemia were not found in all patients. Weakness was minor or absent. The electromyogram showed absence of electrical activity in ripples and PIMM, and muscle biopsy specimens confirmed caveolin-3 deficiency and absence of caveolae. Genetic analysis revealed a CAV3 c.G136A transition resulting in a p.A46T missense mutation in affected family members. The phenotype in these 23 cases of RMD with this mutation appears to be homogenous, benign, and nonprogressive. The presence of PIMM and PIRC seems to be diagnostic at all ages, whereas the absence of hyperCKemia and rippling does not exclude the diagnosis. Muscle Nerve 41: 751-757,2010

Details

Authors
  • Jimmy Sundblom
  • Erik Stalberg
  • Maria Osterdahl
  • Franz Rucker
  • Maria Montelius
  • Hannu Kalimo
  • Inger Nennesmo
  • Gunilla Islander
  • Anja Smits
  • Niklas Dahl
  • Atle Melberg
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Anesthesiology and Intensive Care

Keywords

  • stiffness, rippling, mutation, Caveolin-3, electromyogram
Original languageEnglish
Pages (from-to)751-757
JournalMuscle and Nerve
Volume41
Issue number6
Publication statusPublished - 2010
Publication categoryResearch
Peer-reviewedYes