Upper Limb Lengthening in Achondroplasia Using Unilateral External Fixation

Area of Science:

• Orthopedic Surgery
• Pediatric Orthopedics
• Limb Lengthening

Background:

• Achondroplastic patients often have disproportionately short humeri, impacting upper limb function and aesthetics.
• Surgical intervention for humeral lengthening aims to improve functional outcomes and patient satisfaction.

Purpose of the Study:

• To evaluate the long-term results of humeral lengthening in achondroplastic patients.
• To identify optimal surgical techniques for enhancing patient outcomes.

Main Methods:

• Retrospective review of 54 humeral lengthening procedures in 27 achondroplastic patients under 17 years old.
• Callotasis with unilateral external fixation was the primary surgical technique used.
• Minimum follow-up of 36 months was required for inclusion.

Main Results:

• Mean lengthening achieved was 8.82 cm (54.80% increase).
• Shoulder and elbow function were preserved in most patients, with significant improvements in daily living activities.
• Short-term complications included pin-tract infections and radial nerve neuropraxia; long-term complications involved nonunion and elbow contractures.

Conclusions:

• Callotasis with unilateral external fixation is a reliable method for humeral lengthening in achondroplastic patients.
• Guided fixator placement and proximal humeral osteotomy are recommended to mitigate complications and improve results.