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