title: Avulsion fracture of the calcaneus at the origin of the abductor hallucis muscle.
abstract: Previously reported avulsion fractures of the calcaneus have been confined to the attachment of the tendo achillis, bifurcate ligament, extensor digitorum brevis muscle, or the plantar fascia. A case report of a previously undescribed avulsion fracture of the calcaneus due to the abductor hallucis muscle is presented. The mechanism of injury, forced dorsiflexion of the forefoot, is described. A diagnostic and treatment regimen is provided. With appropriate identification of the injury, this unusual calcaneal fracture can be adequately managed.
authors.affiliation: Department of Podiatric Surgery, Kern Hospital, Warren, Michigan.
authors.forename: J P
authors.initials: JP
authors.lastname: Pelletier
authors.forename: I O
authors.initials: IO
authors.lastname: Kanat
mesh_terms: D000328:Adult; D002111:Calcaneus / Q000293:injuries*; D002370:Casts, Surgical; D005260:Female; D050723:Fractures, Bone / Q000000981:diagnostic imaging / Q000209:etiology* / Q000628:therapy; D006801:Humans; D009132:Muscles / Q000503:physiopathology; D011859:Radiography; D013165:Splints; D013314:Stress, Mechanical