title: A useful alternative approach for the treatment of well-demarcated Basal cell carcinoma: surgical excision and margin control with tzanck smear test.
abstract: OBJECTIVE
  To analyze the accuracy of the Tzanck smear test (TST) for margin control in surgery for well-demarcated basal cell carcinoma (BCC).
  
  
  METHODS
  Twenty-one patients with well-demarcated BCC were included in this study. After local anesthesia, the tumors were excised. The pathologist examined the frozen sections. If the tumor cells were observed in the margin, a re-excision was done. This procedure was repeated until the margin was tumor free. After each excision, Tzanck smear samples were taken from the defect area. The samples obtained were stained with May-Grünwald-Giemsa and examined. The accuracy of TST was then analyzed by comparison of the TST results with those of frozen section examination.
  
  
  RESULTS
  The sensitivity and specificity of TST for margin assessment were 1.00 (95% confidence interval (CI)=1.00-1.00) and 0.99 (95% CI=0.98-1.00), respectively. Positive and negative predictive values and the diagnostic accuracy for TST were 0.94 (95% CI=0.84-1.05), 1.00 (95% CI=1.00-1.00), and 1.00 (95% CI=0.99-1.00), respectively. No recurrences were observed in the average 2-year follow-up period.
  
  
  CONCLUSIONS
  The high accuracy of TST for margin control is encouraging to develop a practical alternative approach for the treatment of well-demarcated BCC.
authors.affiliation: Department of Dermatology, Başkent University Faculty of Medicine, Adana. metebaba17@hotmail.com
authors.forename: Mete
authors.initials: M
authors.lastname: Baba
authors.forename: Murat
authors.initials: M
authors.lastname: Durdu
authors.forename: Deniz
authors.initials: D
authors.lastname: Seçkin
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002280:Basal Cell Carcinoma / Q000473:pathology / Q000601:surgery*; D002610:Cheek; D003581:Cytodiagnosis / Q000379:methods; D005260:Female; D005546:Forehead; D006225:Hand; D006258:Head and Neck Neoplasms / Q000473:pathology / Q000601:surgery*; D006801:Humans; D007432:Intraoperative Period; D008297:Male; D008875:Middle Aged; D009669:Nose Neoplasms / Q000473:pathology / Q000601:surgery; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012867:Skin / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology / Q000601:surgery*; D055815:Young Adult