title: Cutaneous squamous cell carcinoma developing in lupus vulgaris exfoliativus persistent for 40 years.
abstract: BACKGROUND
  A 65-year-old man is described with a 40-year history of lupus vulgaris exfoliativus, a form of cutaneous tuberculosis that resembles psoriasis. He had been misdiagnosed as having psoriasis vulgaris for many years. A cutaneous squamous cell carcinoma developed within a plaque of lupus vulgaris exfoliativus.
  
  
  METHODS
  A skin biopsy provided the correct diagnoses.
  
  
  RESULTS
  The patient was successfully treated with medication for tuberculosis and had his skin cancer cured by surgical excision.
  
  
  CONCLUSIONS
  With an increasing worldwide incidence of tuberculosis, one needs to be aware of its cutaneous forms and variants, as well as its complications, in particular skin cancer. Lupus vulgaris exfoliativus may resemble psoriasis vulgaris.
authors.affiliation: Department of Dermatology, University School of Poznan, Poland.
authors.forename: Agnieszka
authors.initials: A
authors.lastname: Zawirska
authors.forename: Zygmunt
authors.initials: Z
authors.lastname: Adamski
authors.forename: Ewa
authors.initials: E
authors.lastname: Stawicka
authors.forename: Robert A
authors.initials: RA
authors.lastname: Schwartz
mesh_terms: D000368:Aged; D000995:Antitubercular Agents / Q000627:therapeutic use; D001706:Biopsy; D002294:Carcinoma, Squamous Cell / Q000150:complications* / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008177:Lupus Vulgaris / Q000150:complications* / Q000188:drug therapy / Q000473:pathology*; D008297:Male; D012878:Skin Neoplasms / Q000150:complications* / Q000473:pathology* / Q000601:surgery; D013848:Thigh; D013997:Time Factors
chemical_list: D000995:Antitubercular Agents