A case of adult-onset reducing body myopathy presenting a novel clinical feature, asymmetrical involvement of the sternocleidomastoid and trapezius muscles

Takayuki Fujii, Shintaro Hayashi, Nobutoshi Kawamura, Masa Aki Higuchi, Jun Tsugawa, Yasumasa Ohyagi, Yukiko K. Hayashi, Ichizo Nishino, Jun Ichi Kira

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We herein report a 32-year-old woman with adult-onset reducing body myopathy (RBM) who had a mutation in the four-and-a-half LIM domain 1 gene (FHL1) and showed a marked asymmetrical involvement of sternocleidomastoid and trapezius muscles. At 30 years of age she noticed bilateral foot drop, and over the next two years developed difficulty raising her right arm. At 32 years of age she was admitted to our hospital for a diagnostic evaluation. Neurological examination showed moderate weakness and atrophy of her right sternocleidomastoid muscle, right trapezius muscle, and bilateral upper proximal muscles. There were severe weakness and atrophy of her bilateral tibialis anterior muscles. Her deep tendon reflexes were hypoactive in her upper extremities. Her serum creatine kinase level was mildly increased. Muscle biopsy specimens from the left tibialis anterior muscle revealed marked variation in fiber size, some necrotic or regenerating fibers, and reducing bodies. Gene analysis of FHL1 demonstrated a mutation: a heterozygous missense mutation of c.377G > A (p. C126T) in FHL1. Compared with previous adult-onset RBM cases harboring mutations in FHL1, our case was characterized by asymmetrical atrophy of the sternocleidomastoid and trapezius muscles.

Original languageEnglish
Pages (from-to)206-210
Number of pages5
JournalJournal of the Neurological Sciences
Volume343
Issue number1-2
DOIs
Publication statusPublished - Aug 15 2014

All Science Journal Classification (ASJC) codes

  • Neurology
  • Clinical Neurology

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