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Abstract
Blount’s disease is one of the pathological causes of genu var
most authors include only the infantile and late-onset (adolescent) typ
called idiopathic. Both have similar aetiology, and histopathology
radiographic findings.
The estimated prevalence of infantile Blount’s disease in the young children with significant bowlegs in the United States is less prevalence of late-onset Blount disease was found to be 2.5% in the greatest risk (i.e., obese black males).
The aetiology of Blount’s disease is most likely multif biomechanical overload of the proximal, medial tibial physis individuals with genetically determined susceptibility. This creates a of loading and deformity, which will ultimately result in perm damage. Significant static varus alignment and moderately increase is implicated in the pathophysiology of infantile type. However, un varus alignment of the knee is not a prerequisite for the developmen
tibia vara. Relatively modest dynamic gait deviations that compensat thigh girth, with excessive body weight, can generate compression medial compartment capable of inhibiting physeal growth.
Patients are obese, usually exceeding the 95th percentile for wei increasing bowing occurs without apparent cause. The abnormality is by varus and internal torsion of the tibia. Other deformities may be pr The mechanical axis of the limb is the most functional measu amount of deformity present. A detailed preoperative plan is ess
surgical procedure. The overall plan should correct each of th deformities. Intraoperative radiographs are necessary to ob alignment.
In infantile Blount’s disease, Langenskiöld classified the radio
appearance of the infantile type into six stages. Medial metaphyseal fragm
is pathognomonic for the development of progressive tibia vara.
Radi differentiation between physiologic genu varum and Blount’s disease is im because the prognosis and treatment differ profoundly. Femoral-tibial rati the ratio of the femoral to tibial metaphyseal-diaphyseal angle, is
differentiating physiologic bowing from infantile tibia vara.