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[Benign, focal amyotrophy].

H Schnyder1, M Meyer

  • 1Neurologische Klinik, Universitätsspital Zürich.

Schweizerische Medizinische Wochenschrift
|February 9, 1991
PubMed
Summary
This summary is machine-generated.

Benign focal amyotrophy is a rare, asymmetrical motor neuron disease in young people with a good prognosis, unlike amyotrophic lateral sclerosis (ALS). This study details cases of Hirayama disease and "wasted leg syndrome," suggesting new benign focal amyotrophy entities.

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Area of Science:

  • Neurology
  • Neuron science
  • Clinical neurology

Background:

  • Benign focal amyotrophy (BFA) is a rare motor neuron disease affecting young individuals.
  • It is characterized by asymmetrical muscle wasting and a favorable prognosis, distinguishing it from progressive motor neuron diseases like amyotrophic lateral sclerosis (ALS).

Observation:

  • The study presents three distinct cases of BFA.
  • Case 1: A patient with juvenile muscular atrophy of the unilateral upper extremity (Hirayama type).
  • Cases 2 & 3: Two patients with selective unilateral calf amyotrophy, termed "wasted leg syndrome."
  • Additional observation: Three young women with stable, selective scapular muscle atrophy over many years.

Findings:

  • The findings highlight the heterogeneity within benign focal amyotrophy.

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  • Hirayama disease and "wasted leg syndrome" represent specific clinical presentations of BFA.
  • The stable scapular muscle atrophy observed may constitute a previously unrecognized entity of BFA.

    • Implications:

    • These observations expand the spectrum of recognized benign focal amyotrophy conditions.
    • Distinguishing BFA from ALS is crucial for accurate diagnosis and patient management.
    • Further research into these specific BFA subtypes may elucidate underlying pathomechanisms and inform targeted therapies.