Orphanet: Spinal muscular atrophy with respiratory distress type 1

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Spinal muscular atrophy with respiratory distress type 1

Disease definition

Spinal muscular atrophy with respiratory distress type 1 is a rare genetic motor neuron disease characterized by severe respiratory distress/respiratory failure in association with diaphragmatic eventration and palsy, as well as progressive, symmetrical, distal-to-proximal muscle weakness and atrophy (in lower limbs especially). Patients typically have a history of intrauterine growth retardation, low birth weight, feeble cry, weak suck and failure to thrive and present with inspiratory stridor, recurrent episodes of dyspnea or apnea, cyanosis and absent deep tendon reflexes. Kyphosis/scoliosis, foot deformities and joint contractures are frequently associated features.


Classification level: Disorder
  • Synonym(s):
    • Autosomal recessive distal spinal muscular atrophy type 1
    • Autosomal recessive spinal muscular atrophy with respiratory distress
    • Diaphragmatic spinal muscular atrophy
    • Distal hereditary motor neuropathy type 6
    • Distal-HMN type 6
    • SIANRF
    • SMARD1
    • Severe infantile axonal neuropathy with respiratory failure type 1
    • dHMN6
    • dSMA1
  • Prevalence: <1 / 1 000 000
  • Inheritance: Autosomal recessive 
  • Age of onset: Infancy, Neonatal
  • ICD-10: G12.2
  • OMIM: 604320
  • UMLS: C1858517
  • MeSH: -
  • GARD: 8592
  • MedDRA: -

Detailed information

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ERN : produced/endorsed by ERN(s)
FSMR : produced/endorsed by FSMR(s)
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