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Polydactyly
Definition |
One or more extra digits |
| Incidence | 1:3000 caucasians, 1:300 African/West Indian |
| Diagnosis | Ultrasound, can be post axial (ulnar/fibular side - commonest) or pre axial (radial/tibial side) |
| Gestation at diagnosis | 18 weeks |
| Known chromosomal or genetic association | Yes, but only in association with other abnormalities. Commonest chromosomal abnormality trisomy 13. Many genetic syndromes associated |
| Further investigations | Karyotype if other abnormalities or known genetic family history. 3D/4D ultrasound may be useful if diagnostic uncertainty |
| Differential Diaganosis | None |
| Prognosis | Dependent on cause |
| Recurrance risk | Dependent on cause |
| Research Studies |
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