title: The flexible flatfoot in the adult.
abstract: The adult acquired flatfoot deformity is characterized by flattening of the medial longitudinal arch with insufficiency of the supporting posteromedial soft tissue structures of the ankle and hindfoot. While the etiology of this deformity can be arthritic or traumatic in nature, it is most commonly associated with posterior tibial tendon dysfunction (PTTD). By one estimate, PTTD affects approximately five million people in the United States. The clinical presentation of adult flatfoot can range from a flexible deformity with normal joint integrity to a rigid, arthritic foot.
authors.affiliation: Santa Monica Orthopaedic Group, 1313 20th Street, Suite 150, Santa Monica, CA 90404, USA. egiza@smog-ortho.net
authors.forename: Eric
authors.initials: E
authors.lastname: Giza
authors.forename: Gerard
authors.initials: G
authors.lastname: Cush
authors.forename: Lew C
authors.initials: LC
authors.lastname: Schon
mesh_terms: D000328:Adult; D002111:Calcaneus / Q000601:surgery; D005413:Flatfoot / Q000209:etiology / Q000601:surgery* / Q000628:therapy; D006801:Humans; D010027:Osteotomy / Q000379:methods; D037081:Posterior Tibial Tendon Dysfunction / Q000150:complications; D019736:Prostheses and Implants; D013709:Tendon Transfer