Differences between Bilateral Costal Cartilage in Patients with Microtia: A Retrospective Study Using...

Area of Science:

• Plastic Surgery
• Pediatric Orthopedics
• Anatomy

Background:

• Costal cartilage is crucial for auricular reconstruction in microtia surgery.
• Optimal cartilage development is linked to surgical success, but donor site selection remains debated.

Purpose of the Study:

• To investigate laterality differences in costal cartilage development in pediatric microtia patients.
• To determine if left or right costal cartilage is better suited for auricular framework fabrication.

Main Methods:

• Retrospective analysis of thoracic CT scans from 101 microtia patients (ages 6-10).
• 3D reconstruction of costal cartilage using specialized software.
• Measurement of length and volume of the 6th, 7th, and 8th ribs' cartilage.

Main Results:

• Left-sided 6th rib cartilage was significantly longer and larger in volume than the right.
• Left-sided 7th rib cartilage was significantly longer, with no volume difference.
• No significant differences were observed in the 8th rib cartilage between sides.
• Overall, left thoracic costal cartilage showed more development than the right.

Conclusions:

• Left-sided costal cartilage, particularly the 6th and 7th ribs, is generally more developed in pediatric patients.
• These findings can guide surgeons in choosing superior donor sites for auricular reconstruction in microtia.
• Understanding laterality differences optimizes graft selection for better surgical outcomes.