X-linked infantile spinal muscular atrophy

Am J Dis Child. 1988 Feb;142(2):217-9. doi: 10.1001/archpedi.1988.02150020119045.

Abstract

Four male infants from three sibships in an extended family were noted to have hypotonia, areflexia, and congenital joint contractures. The findings of electromyography and muscle histology were consistent with infantile spinal muscular atrophy (SMA). Pedigree analysis suggests that this disorder represents an X-linked, recessive form of SMA. Findings in similar kindreds may explain the previously reported increased male-female ratio in infantile SMA.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Biopsy
  • Genes, Recessive*
  • Genetic Linkage
  • Humans
  • Infant, Newborn
  • Male
  • Muscles / pathology
  • Muscular Atrophy, Spinal / genetics*
  • Pedigree
  • Spinal Muscular Atrophies of Childhood / genetics*
  • Spinal Muscular Atrophies of Childhood / pathology
  • X Chromosome*