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Virtual Pediatric Hospital: Paediapaedia: Blount Disease (Tibia Vara) Paediapaedia: Musculoskeletal Diseases

Blount Disease (Tibia Vara)

Michael P. D'Alessandro, M.D.
Peer Review Status: Internally Peer Reviewed

Clinical Presentation:
Bowed legs.

There are two types, infantile and adolescent.

The infantile is the most common type, due to developmental or physiologic bowing that fails to straighten as the child begins to bear weight and is due to abnormal medial tibial enchondral ossification. The infantile form is usually bilateral but not symmetric. Mild cases return to normal by 3-4 years old but severe cases may need tibial osteotomy.

The adolescent is the rarer type, is usually unilateral, and is due to segmental arrest of growth plate function.

Infantile form due histologically to disturbed medial tibial enchondral ossification consistent with abnormal pressure against the growth plate.

Imaging Findings:
Marked bilateral genu varus deformity "bowed leg."


See References Chapter.

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