title: Chronic periapical periodontitis containing mature human hair shaft: a case report.
abstract: A case is reported of a 44-year-old male who was referred with persistent pus discharge associated with his UL2 which had been root treated on two occasions. Radiographic examination revealed a radiolucency of approximately 8 mm diameter. An apicectomy was performed and histopathological examination revealed the presence of mature birefringent hair-shaft structures within a chronic periapical periodontitis.
  
  
  CONCLUSIONS
  This article presents a rare occurrence, the presence of human hair in the periapical tissues.
authors.affiliation: University of Manchester.
authors.forename: Mohammad Owaise
authors.initials: MO
authors.lastname: Sharif
authors.forename: Riaz
authors.initials: R
authors.lastname: Yar
authors.forename: Richard
authors.initials: R
authors.lastname: Oliver
mesh_terms: D000328:Adult; D002828:Choristoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D055113:Chronic Periodontitis / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D005549:Foreign-Body Reaction / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D006197:Hair; D006801:Humans; D008297:Male; D010485:Periapical Periodontitis / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D011859:Radiography; D012390:Root Canal Therapy / Q000379:methods; D016896:Treatment Outcome