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Diseases

Genetic and Rare Diseases Information Center (GARD)

Blount disease


Other Names for this Disease
  • Tibia vara
  • Osteochondrosis deformans tibiae
  • Blount's disease
  • Blount-Barber syndrome
  • Erlacher-Blount syndrome
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.

Overview

Blount disease is a growth disorder of the shin bone (tibia) characterized by inward turning of the lower leg (bowing) that slowly worsens over time. While it is not uncommon for young children to have bowed legs, typically the bowing improves with age.[1][2] There are two types of Blount disease (early-onset and late-onset), based on whether symptoms begin before or after four years of age.[3] Blount disease may occur in one or both legs and can lead to shortening of the affected leg and other changes within bones of the legs. The cause of Blount disease is not well understood; however,  a variety of hereditary and genetic factors are likely involved. The condition is more common among certain populations and is associated with obesity and early walking.[1][4] Treatment may involve bracing and/or surgery.[1]
Last updated: 7/27/2016

References

  1. Neil K. Kaneshiro. Blount disease. In: David Zieve. MedlinePlus. 11/20/2014; https://medlineplus.gov/ency/article/001584.htm.
  2. Bowed legs. American Academy of Orthopaedic Surgeon. http://orthoinfo.aaos.org/topic.cfm?topic=A00230. Accessed 3/19/2009.
  3. Sanjeev Sabharwal. Blount disease. J Bone Joint Surg Am. Jul 01 2009; 91 (7):1758-1776. http://www.ncbi.nlm.nih.gov/pubmed/19571101.
  4. Lauren LaMont, MD. Blount disease. Medscape. Dec 17, 2015; http://emedicine.medscape.com/article/1250420.
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Basic Information

  • The American Academy of Orthopaedic Surgeons has information on Blount disease. Click on the link above to view this information page.
  • MedlinePlus was designed by the National Library of Medicine to help you research your health questions, and it provides more information about this topic.

In Depth Information

  • Medscape Reference provides information on this topic. You may need to register to view the medical textbook, but registration is free.
  • The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
  • Online Mendelian Inheritance in Man (OMIM) is a catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine. 
  • Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.
  • PubMed is a searchable database of medical literature and lists journal articles that discuss Blount disease. Click on the link to view a sample search on this topic.
Other Names for this Disease
  • Tibia vara
  • Osteochondrosis deformans tibiae
  • Blount's disease
  • Blount-Barber syndrome
  • Erlacher-Blount syndrome
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.