Metatarsus adductus is a foot deformity characterized by a sharp, inward angle of the front half of the foot. It is thought to occur as a result of the infant's position inside the uterus where the feet are bent inward at the instep. Most cases resolve spontaneously and the majority of the remainder can be corrected with simple exercises.Update Date: 8/29/2008 Updated by: Thomas N. Joseph, MD, Private Practice specializing in Orthopaedics, subspecialty Foot and Ankle, Camden Bone & Joint, Camden, SC. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.