title: Limitation of mouth opening caused by osteochondroma of the coronoid process.
abstract: BACKGROUND
  Osteochondroma at the level of the coronoid process is unusual, causing a slowly progressive facial asymmetry and limitation of mouth opening. Histologically, it is a bone tumor covered by a thin capsule of cartilage. We present a literature review of cases published to date and present a new case in which osteochondroma originating in the coronoid process was associated with the formation of a cyst at the body of the zygoma, necessitating the reconstruction of the body of the zygoma.
  
  
  METHODS
  A 55-year-old woman had a bone tumor in the right malar region, producing a limitation in mouth opening. After preoperative computerized tomography, we decided to excise the lesion and pseudocyst with the use of a combined subciliary and coronal approach, reconstructing the body of the zygoma with a cortical chip of calvarian bone.
  
  
  RESULTS
  The patient regained normal mouth opening, without injury to the fronto-orbital branches of the facial nerve and no recurrence of the tumor to date.
  
  
  CONCLUSIONS
  Osteochondroma is a slow-growing tumor that causes progressive facial asymmetry and limitation of mouth opening. The treatment of choice for symptomatic osteochondromas is surgical resection.
authors: Department of Oral and Maxillofacial Surgery, Santa Lucia Hospital, Cartagena, Spain. te_ba@hotmail.com
authors: Manuel
authors: M
authors: Acosta-Feria
authors: Raquel
authors: R
authors: Villar-Puchades
authors: Juan José
authors: JJ
authors: Haro-Luna
authors: Benito
authors: B
authors: Ramos-Medina
authors: Eulalia
authors: E
authors: García-Solano
mesh_terms: D001845:Bone Cysts / Q000209:etiology; D005146:Facial Asymmetry / Q000209:etiology; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D008339:Mandibular Neoplasms / Q000150:complications*; D008875:Middle Aged; D015831:Osteochondroma / Q000150:complications*; D011862:Radiography, Panoramic; D019651:Plastic Surgery Procedures / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000379:methods; D014313:Trismus / Q000209:etiology*; D015050:Zygoma / Q000473:pathology