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Classification of LaMont et al for Infantile Blount's Disease (Tibia Vara)

Description

LaMont et al reported a classification for infantile Blount's Disease (tibia vara) based on the radiographic appearance. This is based on a modified Langenskiold classification. The authors are from Texas Scottish Rite Hospital for Children in Dallas and Cook Children's Hospital in Fort Worth.


Patient: infant or small child who is bowlegged

 

Radigraphic Changes

Type

partially lucent medial metaphyseal defect, with or without beaking

A

downward-sloping curvature of the lateral and inferior rim of a completely lucent metaphyseal defect; upslope at the medial rim of the metaphyseal defect that resemble a ski jump; no epiphyseal downward slope

B

vertical downsloping deformity of both epiphysis and metaphysis; no upslope at the medial rim of the metaphyseal defect; downward sloping of epiphysis into the metaphyseal defect

C

 

where:

• "Beaking: refers to a change in the metaphysis of the tibia that resembles a bird's beak.

 

In the study of Jardaly et al, the recurrence rate after treatment was 23% for A, 33% for B and 62% for C.

 


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