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Supernumerary auricle on the lateral canthus.

F Shimizu¹, S Nishimoto, T Oyama

¹Department of Plastic Surgery, Kobe Children's Hospital, Kobe, Japan. fumi@med.oita-u.ac.jp

British Journal of Plastic Surgery

|November 17, 2004

Summary

A boy with a congenital appendage on his right eye was treated. The appendage, containing elastic cartilage, was identified as a supernumerary auricle originating from the first branchial arch.

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Area of Science:

Plastic surgery
Craniofacial anomalies
Developmental biology

Background:

Congenital anomalies involving the craniofacial region require precise diagnosis and management.
The lateral canthus is a critical anatomical landmark, associated with facial clefts and embryological structures like the first branchial arch.

Observation:

A male infant presented with a unique congenital anomaly: an appendage at the right lateral canthus, accompanied by supernumerary auricles on the right cheek and a dermoid cyst.
The appendage's core structure was found to be elastic cartilage, similar to that of the external auricle.

Findings:

Surgical resection of the appendage was successfully performed.
Histological examination revealed the appendage's core composed of elastic cartilage.
The appendage's location, overlapping Tessier's facial cleft line No. 8, and its composition suggest development from the first branchial arch, classifying it as a supernumerary auricle.

Implications:

This case highlights the importance of understanding the embryological origins of craniofacial malformations.
Accurate identification of supernumerary auricles and their relationship to facial clefts is crucial for effective surgical planning and outcomes.
Further research into first branchial arch anomalies can improve diagnostic and therapeutic strategies for similar conditions.

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