title: One-stage treatment to osteochondroma of the coronoid process and secondary facial asymmetry with coronoidectomy and reduction malarplasty: a case report and literature review.
abstract: OBJECTIVE
  This study summarizes the literature concerning osteochondroma of the mandibular coronoid process and presents a case of 1-stage treatment for this condition and concomitant facial asymmetry.
  
  
  METHODS
  A 20-year-old man presented with osteochondroma of the mandibular coronoid process. Radiologic images showed a mushroom-shaped coronoid growth inside the zygomatic arch with outward expansion. Coronoidectomy and reduction malarplasty were performed in 1 stage. The literature on osteochondroma of the mandibular coronoid process since 1943 was reviewed concerning etiology, pathogenesis, clinical characteristics, diagnosis, and treatment.
  
  
  RESULTS
  At 20-month follow-up, the patient achieved markedly improved joint function and a symmetric facial appearance after excision of the osteochondroma.
  
  
  CONCLUSIONS
  Coronoidectomy combined with simultaneous reduction malarplasty could be an alternative and promising method to treat osteochondroma of the coronoid process with secondary facial asymmetry.
authors.affiliation: Resident, State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
authors.forename: Huanhuan
authors.initials: H
authors.lastname: Fan
authors.affiliation: Resident, State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
authors.forename: Xue
authors.initials: X
authors.lastname: Lv
authors.affiliation: Resident, State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Shi
authors.affiliation: Professor, State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, China. Electronic address: drhu@vip.sohu.com.
authors.forename: Jing
authors.initials: J
authors.lastname: Hu
authors.affiliation: Professor, State Key Laboratory of Oral Disease, West China Hospital of Stomatology, Sichuan University, Chengdu, China. Electronic address: luoen521125@sina.com.
authors.forename: En
authors.initials: E
authors.lastname: Luo
mesh_terms: D004955:Esthetics, Dental; D005146:Facial Asymmetry / Q000601:surgery*; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008339:Mandibular Neoplasms / Q000601:surgery*; D015831:Osteochondroma / Q000601:surgery*; D010027:Osteotomy / Q000379:methods; D016059:Range of Motion, Articular / Q000502:physiology; D019651:Plastic Surgery Procedures / Q000379:methods; D013704:Temporomandibular Joint / Q000502:physiology; D055815:Young Adult; D015050:Zygoma / Q000601:surgery*