Duplication of the thumb unilateral biphalangeal
Overview
A rare malformation where the two bones in one thumb are duplicated.
Symptoms
* Broad thumb * Duplicated thumb bones
Diagnosis
* Diagnosed by external observation, X-ray, or ultrasound
Treatment
* Polydactyly o Can be corrected surgically to improve appearance and functioning o Usually done at 1 year of age so skeletal development is complete and accurate anatomic assessment can be done o May require reconstruction of any associated abnormalities in remaining digit o Cast and soft dressing may be used until healed * Syndactyly o Treatment aimed at maintaining and improving function with cosmetic benefits o Involves surgery and may require skin graft from groin area o Surgery usually done after 1 year and may be delayed as late as 18-24 months