Adolescent Blount disease in Adult
Contributors: Aron Sulovari BA, Katie Rizzone MD, MPH
Synopsis
Causes / typical injury mechanism: Blount disease is a growth disorder of the medial proximal tibial physis and epiphysis that results in genu varum malalignment deformity.
Classic history and presentation: Late-onset or adolescent Blount disease usually presents in patients older than 10 years.
Prevalence:
- Age – Seen in patients older than 10 years.
- Sex / gender – Male predominance.
Risk factors: Obesity, Afro-Caribbean ethnicity.
Pathophysiology: The exact pathophysiology is unknown. It may occur due to excessive mechanical loading as a larger thigh size increases the varus-inducing load, and there may be genetic susceptibility factors.
Codes
ICD10CM:
M92.519 – Juvenile osteochondrosis of proximal tibia, unspecified leg
SNOMEDCT:
880067009 – Blount disease
Differential Diagnosis & Pitfalls
To perform a comparison, select diagnoses from the classic differential
Last Reviewed:01/19/2021
Last Updated:01/19/2021