title: Post-traumatic otosclerosis: coincidence or trigger factor?
abstract: OBJECTIVE
  The etiology of otosclerosis is poorly understood and environmental as well as genetic factors have been implicated. In this paper we will present 3 cases of otosclerosis with a clinical history of trauma and we will discuss with a literature review the place of trauma in otosclerosis etiology.
  
  
  METHODS
  3 patients with clinically diagnosed otosclerosis, operated, and with a clinical history of previous head trauma.
  
  
  CONCLUSIONS
  It is probable that environmental factors could be involved in the development of the disease and we think that trauma could be one of them. The mechanisms by which it could results in otosclerosis remain unknown. However these cases appear to be rare and under studied.
authors.affiliation: G. Portmann Institute, Curitiba, Brazil.
authors.forename: J F
authors.initials: JF
authors.lastname: Polanski
authors.forename: M F M
authors.initials: MF
authors.lastname: Quispe
authors.forename: F
authors.initials: F
authors.lastname: Felix
authors.forename: L
authors.initials: L
authors.lastname: Condon
authors.forename: D
authors.initials: D
authors.lastname: Portmann
mesh_terms: D000328:Adult; D002884:Chromosomes, Human, Pair 15 / Q000235:genetics; D002885:Chromosomes, Human, Pair 16 / Q000235:genetics; D002897:Chromosomes, Human, Pair 7 / Q000235:genetics; D004423:Ear / Q000293:injuries*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013506:Otologic Surgical Procedures / Q000379:methods*; D010040:Otosclerosis / Q000209:etiology* / Q000235:genetics; D012307:Risk Factors; D014947:Wounds and Injuries / Q000150:complications