Oculoauriculovertebral spectrum with radial defects

Oculoauriculovertebral spectrum with radial defects (also known as OAVS with radial defects, or hemifacial microsomia with radial defects) is a rare congenital condition that combines features of the oculoauriculovertebral spectrum (OAVS, also known as Goldenhar syndrome spectrum) with abnormalities of the radial ray (thumb side) of the upper limbs. OAVS itself is characterized by asymmetric underdevelopment of structures derived from the first and second pharyngeal arches, primarily affecting the face, ears, and spine. In this particular variant, patients additionally present with radial defects, which may include hypoplasia or absence of the radius, thumb anomalies (hypoplastic or absent thumbs), and other preaxial upper limb malformations. Key clinical features include hemifacial microsomia (underdevelopment of one side of the face), microtia or other external ear malformations, preauricular skin tags, epibulbar dermoids or other ocular anomalies, vertebral anomalies (such as hemivertebrae or fused vertebrae), and the characteristic radial ray defects. Cardiac and renal anomalies may also be present in some patients. The condition is typically apparent at birth due to the visible craniofacial and limb abnormalities. Management is multidisciplinary and symptomatic, involving craniofacial surgery, orthopedic interventions for limb defects, hearing assessment and rehabilitation, ophthalmologic care, and monitoring for associated cardiac or renal anomalies. Surgical reconstruction of the ear, jaw, and hand may be required depending on severity. The etiology is not fully understood; most cases appear to occur sporadically, though familial cases have been reported with variable inheritance patterns. Genetic counseling is recommended for affected families.

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