title: Clarification of the anatomic definition of the bunion deformity.
abstract: Evolution of the terminology applied to the bunion deformity has progressed in parallel with our changing understanding of the deformity itself. Along this path of progression have been multiple terms, sometimes with multiple meanings. Hallux valgus and metatarsus primus varus are 2 of the most common terms for the deformity. Although commonly used, these descriptors can have multiple meanings, and inconsistencies in interpretation can lead to confusion. We propose a more detailed terminology to provide a more accurate description of the entire bunion deformity in 3 planes and for both the hallux and the metatarsal component of the deformity. The term we propose is hallux abducto valgus with metatarsus primus adducto valgus. An accurate understanding of the multiplanar position of the deformed foot is important for planning deformity correction. The descriptors in the terminology proposed will keep in the forefront the aspects of correction required for the first ray and hallux to be returned to an anatomically correct position.
authors.affiliation: UnityPoint Clinic, Foot and Ankle Division, Fort Dodge, IA; and Adjunct Professor, Des Moines University College of Podiatric Medicine and Surgery, Des Moines, IA. Electronic address: daytonp@me.com.
authors.forename: Paul
authors.initials: P
authors.lastname: Dayton
authors.affiliation: Podiatric Medical Student, Des Moines University College of Podiatric Medicine and Surgery, Des Moines, IA.
authors.forename: Merrell
authors.initials: M
authors.lastname: Kauwe
authors.affiliation: Assistant Professor, Des Moines University College of Podiatric Medicine and Surgery, Des Moines, IA.
authors.forename: Mindi
authors.initials: M
authors.lastname: Feilmeier
mesh_terms: D005528:Foot / Q000033:anatomy & histology* / Q000502:physiology; D006215:Hallux Valgus / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D009068:Movement; D009626:Terminology as Topic
keywords: frontal plane; hallux abucto valgus; metatarsus primus adducto valgus; metatarsus primus varus; rotation