Postaxial polydactyly of the foot

Case contributed by Domenico Nicoletti
Diagnosis certain

Presentation

Incidental finding in Patau syndrome (mosaic)

Patient Data

Age: 20 years
Gender: Female
Oblique
Frontal
Lateral
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Info

Fifth toe polydactyly with broad-headed metatarsal bone, no shaft duplication and phalangeal duplication.

Case Discussion

Polydactyly is a congenital anomaly characterized by additional digit(s), ranging from a rudimentary structure to a completely developed accessory ray. Polydactyly is generally divided into three groups: medial ray (preaxial), and central or lateral rays (postaxial). Postaxial polydactyly is defined as a complete or partial supernumerary digit on the lateral aspect of the foot. Patau syndrome (trisomy 13) includes cleft lip and palate, holoprosencephaly, polydactyly, rocker-bottom feet, microphthalmia, microcephaly, and severe mental retardation.

Case courtesy: Dr.ssa Chiara Gennari

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