Tetrapolydactyly of postaxial type

The case is presented of a 2-week-old boy with polydactyly occurring on the ulnar and fibular sides of the four extremities, which can be defined as tetrapolydactyly of postaxial type . Although the condition was not associated with syndactyly, it appears to represent a further example of a previously described anomaly, which was labelled tetrapolysyndactyly with postaxial type of polydactyly.