Surgery: Limb Length Discrepancy

Epiphysiodesis and bone lengthening for pediatric limb discrepancy: techniques, postoperative course and recovery. Dr. Priano, Milan.

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Epiphysiodesis or lengthening procedures

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In short

A small length difference between the lower limbs is frequent and often has no clinical relevance. When it exceeds certain values or is associated with other signs, careful evaluation is warranted because it may affect posture, gait and growth. The aim of the visit is to measure the discrepancy reliably and decide whether monitoring or treatment is needed.

When an evaluation can be useful

You notice a clear asymmetry of the pelvis, knees or feet
The child limps without pain or walks asymmetrically
A documented length difference is already known and needs follow-up
Before prescribing heel lifts or insoles on a subjective basis

The aim of the visit is not always to start a treatment: often it is to understand whether the situation can be observed calmly or whether further investigation is needed.

Book a paediatric orthopaedic evaluation See how the paediatric orthopaedic visit works

Visits in Milan at Pini and CTO, subject to availability.

Surgical Techniques

Temporary Epiphysiodesis (Eight-plate)

Minimally invasive technique temporarily slowing growth of the longer limb by placing metal plates on growth cartilages. Residual growth of shorter limb allows equalization.

Indication

Moderate discrepancies (2-5 cm predicted at end of growth) in children with sufficient residual growth.

Recovery

Full weight bearing after a few days. Gradual correction over months/years. Plate removal once equalization achieved.

Definitive Epiphysiodesis

Permanent closure of growth plate through drilling or curettage. Simpler than eight-plate but irreversible.

Indication

Moderate discrepancies when timing is precise and no second removal surgery desired.

Recovery

Quick recovery. No second surgery needed.

Bone Lengthening (external fixator or magnetic nail)

Procedure involving osteotomy and progressive distraction to achieve desired lengthening. PRECICE magnetic nail is modern alternative to external fixator.

Indication

Severe discrepancies (>5 cm) or when epiphysiodesis not feasible.

Recovery

Long process (1 mm/day lengthening). Intensive physical therapy throughout treatment. Variable duration from months to years.

Postoperative Overview

Technique choice depends on predicted end-of-growth discrepancy, patient age, and underlying cause. Accurate planning based on scanograms and residual growth calculations is essential.

Detailed Recovery Timeline

Note: The timeline below is a general baseline. The actual postoperative course varies depending on the specific surgical technique chosen (see procedures above).

Epiphysiodesis: day-surgery. Lengthening: 2-3 days for fixator/nail implant.

Epiphysiodesis: immediate activity resumption. Lengthening: week 1: rest, dressing changes, start distraction (4 times 0.25mm/day).

Epiphysiodesis: normal life, X-ray checks every 3-4 months to monitor correction. Lengthening: active distraction phase, daily physical therapy essential.

Lengthening: distraction duration = cm to lengthen x 1 month approx. Then consolidation phase (2x distraction time).

Return to Sport

Epiphysiodesis: sports OK immediately. Lengthening: sports only after complete consolidation and hardware removal (6-12 months).

Follow-up Schedule

Epiphysiodesis: checks every 3-4 months until plate removal. Lengthening: weekly checks during distraction, then monthly.

Possible Complications

Epiphysiodesis: under/overcorrection (rare). Lengthening: pin infection, joint stiffness, premature consolidation, post-removal fracture. Requires specialized center.

For parents