A Postaxial Polydactyly with a Partial Duplication of the Fifth Metatarsal Without a Supernumerary Digit

Abstract

Postaxial polydactyly of the foot is one of the most common congenital malformations. Only a few cases of postaxial polydactyly with a partial duplication of the fifth metatarsal without a supernumerary digit have been reported, and both metatarsal heads were united to form a common joint with the proximal phalanx in all of those cases. We present a rare case of postaxial polydactyly with a partial duplication of the fifth metatarsal characterized by dual metatarsal heads and an extra proximal phalanx bud, without a supernumerary digit.

A rare polydactyly of the forefoot with partial duplication of the 5th metatarsal and supernumerary digit: A case report

“…In the literature, we found four cases of postaxial polydactyly with a partial duplication of the fifth metatarsal, and they could not be classified based on previous classification systems [2] . Thus, we directly categorized them into three types as follows.…”

“…Postaxial polydactyly with a duplicated metatarsal is manifested with or without a supernumerary digit [2] .…”

Polymetatarsia of the Foot without Polydactyly

“…There exists a paucity of guidelines on surgical management. Polymetatarsia may occur in conjunction with polydactyly, with the supernumerary digit branching from the metatarsals 6,7 . However, polymetatarsia may also occur without visible polydactyly and may only be diagnosed incidentally during an injury or when presenting with a painful tailor's bunion 8 .…”