title: The "joint-elevation" calcaneus fracture: a rare variant of the intra-articular calcaneus fracture-dislocation.
abstract: Calcaneus fractures are the most commonly fractured tarsal bone with approximately 75% being intra-articular in nature. Böhler's angle has been found to be reliable and prognostic, and it has been used as a proxy for joint depression and articular involvement. It often guides the need for advanced imaging and/or operative intervention. We describe a rare variant of intra-articular calcaneus fracture-dislocation that results in elevation of a portion of the posterior facet above the posterior talus and a seemingly normal or increased Böhler's angle, which we call the "joint-elevation" calcaneus fracture. Orthopaedic surgeons should be aware of this previously undescribed variant in order to avoid inappropriate treatment or misdiagnosis.
  
  
  METHODS
  Therapeutic Level IV: Case Series.
authors.affiliation: Orthopaedic Foot and Ankle Fellow, Massachusetts General Hospital, Boston, Massachusetts (TJM)Institute for Foot and Ankle Reconstruction at Mercy, Mercy Medical Center, Baltimore, Maryland (JYK).
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Miller
authors.affiliation: Orthopaedic Foot and Ankle Fellow, Massachusetts General Hospital, Boston, Massachusetts (TJM)Institute for Foot and Ankle Reconstruction at Mercy, Mercy Medical Center, Baltimore, Maryland (JYK) johnkwonmd@gmail.com.
authors.forename: John Y
authors.initials: JY
authors.lastname: Kwon
mesh_terms: D016512:Ankle Injuries / Q000000981:diagnostic imaging / Q000601:surgery*; D002111:Calcaneus / Q000000981:diagnostic imaging / Q000293:injuries / Q000601:surgery*; D005593:Fracture Fixation, Internal / Q000379:methods*; D050723:Fractures, Bone / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011859:Radiography
keywords: calcaneus fracture; fracture-dislocation; joint-elevation; trauma