Orphanet: Blount disease

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Blount disease

Disease definition

Blount disease is characterized by disturbed growth of the inner portion of the upper tibial extremity, progressively leading to bowlegged deformity with bone angulation just below the knee (tibia varus). In 60% of cases, the condition affects both legs.


Classification level: Disorder
  • Synonym(s):
    • Infantile tibia vara
    • Osteochondrosis deformans tibiae
    • Tibia vara Blount
  • Prevalence: Not yet documented
  • Inheritance: Autosomal recessive 
  • Age of onset: Infancy, Childhood
  • ICD-10: M92.5
  • OMIM: 188700  259200
  • UMLS: C0175756
  • MeSH: C536237
  • GARD: 916
  • MedDRA: 10072255
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