ICD-11 definition : Congenital macrostomia or transverse facial cleft is a rare congenital craniofacial
anomaly. It is usually associated with deformities of other structures developed from
the first and second branchial arches and is thought to be part of the manifestations
of hemifacial microsomia, the second most common congenital craniofacial anomaly.;
Congenital macrostomia or transverse facial cleft is a rare congenital craniofacial
anomaly. It is usually associated with deformities of other structures developed from
the first and second branchial arches and is thought to be part of the manifestations
of hemifacial microsomia, the second most common congenital craniofacial anomaly.