A case of a rare first branchial arch anomaly with severe hypoplasia of the mandible and fusion between the mandible and adjacent bones is presented. The patient also had intracranial, cardiac, and acral deformities. The craniofacial malformations may reflect incomplete separation of the first branchial arch Into its maxillary and mandibular processes. The association between the craniofacial and other corporal anomalies is unknown.
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