Oculo-auriculo-vertebral spectrum or OAVS is a developmental disorder of craniofacial morphogenesis.
A complex congenital condition, OAVS is associated with anomalies of the ear, head, neck, and vertebra. Clinical manifestations of OAVS can range from mild or moderate facial asymmetry to severe form with obvious facial deformities. The first and second pharyngeal arches' defective development is the root of the problem.
OAVS represents a phenotypic continuum with a sizable overlap between abnormalities of first and second branchial arches-derived structures. This includes the mandible, maxilla, ears, lips, tongue, and palate. This widely recognized theory postulates that the elements mentioned above will alter embryonic blood flow as it develops. Premature birth and vaginal hemorrhage during pregnancy are examples of intranatal variables.
The mandibular hypoplasia with facial asymmetry, oculo-auricular malformations, and spinal abnormalities make up the typical triad of OAVS. There have also been reports of other functional deficiencies in OAVS, including autistic spectrum disorder, speech problems, dysphagia, hearing loss, and low eyesight. There are reports of scoliosis and spinal cord anomalies in the cervical spine as well.
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