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Trauma

FEMORAL LENGTHENING WITH AN ‘UNSTABLE’ HIP: A CASE SERIES

British Limb Reconstruction Society (BLRS) AGM & Instructional Course



Abstract

Background:

Leg length discrepancy related to absence of the femoral head with proximal migration of the femur presents a treatment dilemma. Late sequelae of neonatal hip sepsis and chronic hip dislocation due to developmental dysplasia are the most common causes. Traditional teaching dictates that the hip is stabilised prior to limb lengthening. Reconstructive options alter the shape of the proximal femur which complicates future surgery.

Methods:

We retrospectively reviewed 3 cases of femoral lengthening with an ‘unstable’ hip without prior stabilization. The aetiology was neonatal hip sepsis in 2 cases and chronic hip dislocation due to developmental dysplasia in 1 case. Lengthening was performed with the use of a retrograde Precice lengthening nail.

Results and Discussion:

The desired length (range 5.5 to 6cm) was achieved in all patients without migration of the proximal femur. In all cases patient satisfaction was high with the lengthening and the ability to abort shoe raises. There was an improvement in gait pattern in all patients.

Conclusion:

Femoral lengthening is possible without prior stabilisation of the hip in so called ‘unstable’ hip situations. The proximal femoral anatomy is not further altered and future salvage procedures such as a total hip replacement are not compromised.