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.