title: Verrucous carcinoma (Buschke-Lowenstein) arising in a sacrococcygeal pilonidal sinus tract: report of a case.
abstract: OBJECTIVE
  Pilonidal sinus disease is usually located in the sacrococcygeal region. Verrucous carcinoma (Buschke-Lowenstein) is a rare variant of squamous cell carcinoma with distinct clinical and histopathologic features, with a favorable prognosis. Malignant degeneration is an infrequent complication, which is associated with a high recurrence rate and poor prognosis.
  
  
  METHODS
  A case report is presented.
  
  
  RESULTS
  We report a 48-year-old man with a 10-year history of recurrent pilonidal sinus disease presented with a sacrococcygeal verrucous carcinoma arising in the pilonidal sinus tract and associated with good prognosis. After operation, a 5-year disease-free follow-up was observed.
  
  
  CONCLUSIONS
  Careful inspection of the pilonidal area in all chronic and long-standing inflammatory processes is important and should be evaluated for malignant transformation.
authors.affiliation: Department of General Surgery, Etimesgut Military Hospital, Ankara, Turkey.
authors.forename: Oner
authors.initials: O
authors.lastname: Mentes
authors.forename: Metin
authors.initials: M
authors.lastname: Akbulut
authors.forename: Mahir
authors.initials: M
authors.lastname: Bagci
mesh_terms: D018289:Carcinoma, Verrucous / Q000473:pathology* / Q000601:surgery*; D002471:Cell Transformation, Neoplastic / Q000473:pathology*; D003937:Diagnosis, Differential; D004848:Epithelium / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D008940:Mitotic Index; D009361:Neoplasm Invasiveness; D010864:Pilonidal Sinus / Q000473:pathology* / Q000601:surgery*; D012008:Recurrence; D012445:Sacrococcygeal Region; D012878:Skin Neoplasms / Q000473:pathology* / Q000601:surgery*; D012983:Soft Tissue Neoplasms / Q000473:pathology* / Q000601:surgery*