title: Lichen sclerosis et atrophicus masquerading as tonsillar squamous cell carcinoma.
abstract: OBJECTIVE
  We report a case of a 70-year-old man of Asian origin with lichen sclerosus et atrophicus affecting the tonsil, which presented as a painful, enlarging, exophytic lesion mimicking squamous cell carcinoma.
  
  
  METHODS
  We present a case report and a review of the world literature regarding lichen sclerosus et atrophicus.
  
  
  RESULTS
  Lichen sclerosus is a chronic, benign, inflammatory dermatosis of the skin and mucous membranes which mostly affects the female genitalia, presenting as white plaques with epidermal atrophy. The cause is unknown, although a number of aetiologies have been proposed. The prevalence is unknown. Women have been reported to be affected six to 10 times more than men, and the condition has no known racial preference.
  
  
  CONCLUSIONS
  Our patient illustrates a rare case of the condition lichen sclerosus et atrophicus; to our knowledge, this case represents the first report of tonsillar involvement of the condition. The case presented a diagnostic challenge.
authors.affiliation: ENT Department, West Middlesex University Hospital, Isleworth, UK.
authors.forename: O
authors.initials: O
authors.lastname: Ajayi
authors.forename: J C
authors.initials: JC
authors.lastname: Stephens
authors.forename: S
authors.initials: S
authors.lastname: Karim
authors.forename: N
authors.initials: N
authors.lastname: Daly
mesh_terms: D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000473:pathology* / Q000601:surgery; D003937:Diagnosis, Differential; D006801:Humans; D018459:Lichen Sclerosus et Atrophicus / Q000473:pathology* / Q000601:surgery; D008297:Male; D014066:Palatine Tonsil / Q000473:pathology* / Q000601:surgery; D014067:Tonsillar Neoplasms / Q000473:pathology* / Q000601:surgery