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Blount's disease - Overview

Alternative Names

Tibia vara

Definition of Blount's disease:

Blount's disease is a growth disorder of the shin bone (tibia) in which the lower leg turns inward, resembling a bowleg.

Causes, incidence, and risk factors:

Blount's disease occurs in young children and adolescents. The cause is unknown but is thought to be due to the effects of weight on the growth plate. The inner part of the shin bone, just below the knee, fails to develop normally.

Unlike bowlegs, which tend to straighten as the child develops, Blount's disease slowly gets worse. It can cause severe bowing of one or both legs.

This condition is more common among African-American children. It is also associated with obesity and early walking.

Anterior skeletal anatomy

Reviewed last on: 11/12/2010
Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

References

Canale ST. Osteochondrosis or epiphysitis and other miscellaneous affections. In: Canale ST, Beatty JH, eds. Campbell's Operative Orthopaedics. 11th ed. Philadelphia, Pa: Mosby Elsevier; 2007:chap 29.

Bowlegs

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