Additional metatarsal bones in Apert's syndrome

Apert's syndrome (acrocephalosyndactyly type 1) is an autosomal dominant condition characterized by the progressive synostoses of the skull, spine, hands and feet. It is caused by a mutation affecting the fibroblastic growth factor type 2 receptors. While there are many descriptions of the hands in this condition, there are few previous reports concerning the anatomy of the feet. We present a new case with bilateral additional metatarsal bones, a condition we cannot find described in the literature, and discuss previously reported foot abnormalities.