Coxa vara is a deformity of the hip, whereby the angle between the head and the shaft of the femur is reduced to less than 120 degrees.

It can also occur when the bone tissue in the neck of the femur is softer than normal, causing it to bend under the weight of the body.

It is most commonly a sequela of osteogenesis imperfecta, Paget's disease, osteomyelitis, tumour and tumour-like conditions (e.g. fibrous dysplasia).

In early skeletal development, a common physis serves the greater trochanter and the capital femoral epiphysis.

Indication for surgery: HE angle more than 60 degrees, progressive deformity, neck-shaft angle <90 degrees, development of Trendelenburg gait Surgery: subtrochanteric valgus osteotomy with adequate internal rotation of distal fragment to correct anteversion; common complication is recurrence.

If HE angle is reduced to 38 degrees, less evidence of recurrence; post operative spica cast is used for a period of 6–8 weeks.