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Neonatal dermatomyositis

Disease definition

Neonatal dermatomyositis is a very rare, secondary, neonatal autoimmune disease characterized by generalized weakness, severe hypotonia, absent or reduced deep tendon reflexes, and highly elevated serum creatine kinase levels presenting in the neonatal period. Perifascicular atrophy in the presence of a diffuse perivascular inflammatory cell exudate is observed on muscle biopsy.


Classification level: Disorder
  • Synonym(s):
    • Neonatal DM
  • Prevalence: <1 / 1 000 000
  • Inheritance: -
  • Age of onset: Neonatal
  • ICD-10: M33.1
  • OMIM: -
  • UMLS: -
  • MeSH: -
  • GARD: -
  • MedDRA: -
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