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Genetic and Rare Diseases Information Center (GARD)

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Blount disease

Other Names for this Disease
  • Blount's disease
  • Blount-Barber syndrome
  • Erlacher-Blount syndrome
  • Osteochondrosis deformans tibiae
  • Osteochondrosis deformans tibiae, familial infantile type
More Names
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Your Question

My 18-month-old grandson is suspected of having Blount disease. How common is it for only one leg to have bowing?

Our Answer

We have identified the following information that we hope you find helpful. If you still have questions, please contact us.

How often does Blount disease only affect one leg?

Blount disease usually involves both legs when symptoms begin before age 10, however, in approximately 20 percent of these cases only one leg is affected. Older individuals with Blount disease are much more likely to have only one affected leg. It is estimated that 80 percent of these individuals experience bowing in one leg.[1]
Last updated: 7/6/2009