Polydactyly postaxial

Polydactyly postaxial is a genetic disorder characterized by the presence of additional fingers or toes on the ulnar or fibular side of the limbs. This condition is a type of polydactyly, a broader term for the occurrence of supernumerary digits.

Etiology

Polydactyly postaxial is primarily caused by genetic mutations. It can occur as an isolated trait or as part of a genetic syndrome. The most common genetic syndromes associated with polydactyly postaxial include Ellis-van Creveld syndrome, Laurence-Moon syndrome, and Smith-Lemli-Opitz syndrome. The condition can be inherited in an autosomal dominant or autosomal recessive manner.

Clinical Presentation

Individuals with polydactyly postaxial typically present with an extra digit on the ulnar side of the hand or the fibular side of the foot. The extra digit can range from a small, soft tissue appendage to a fully formed, functional digit. In some cases, the extra digit may be accompanied by other physical abnormalities or health issues, particularly if the polydactyly is part of a genetic syndrome.

Diagnosis

Diagnosis of polydactyly postaxial is typically made through a physical examination. In some cases, the condition can be detected prenatally through an ultrasound. Genetic testing may be performed to determine if the polydactyly is part of a genetic syndrome.

Treatment

Treatment for polydactyly postaxial typically involves surgical removal of the extra digit. In some cases, if the extra digit is fully formed and functional, it may be left in place. The decision to remove the extra digit is typically based on the individual's overall health, the functionality of the extra digit, and personal preference.

See Also

• Polydactyly
• Ellis-van Creveld syndrome
• Laurence-Moon syndrome
• Smith-Lemli-Opitz syndrome