title: Comparative performance of 4 dermoscopic algorithms by nonexperts for the diagnosis of melanocytic lesions.
abstract: OBJECTIVE
  To assess 4 dermoscopy methods in a nonexpert setting.
  
  
  METHODS
  Sixty-one medical practitioners, mainly primary care physicians in Australia, were trained in 4 dermoscopy algorithms. Participants then assessed macroscopic and dermoscopic images of 40 melanocytic skin lesions. Each of the dermoscopic images was assessed with pattern analysis, the 7-point checklist, the ABCD rule, and the Menzies method.
  
  
  RESULTS
  The Menzies method showed the highest sensitivity, 84.6%, for the diagnosis of melanoma, followed by the 7-point checklist (81.4%), the ABCD rule (77.5%), pattern analysis (68.4%), and assessment of a macroscopic image (60.9%). Pattern analysis and assessment of the macroscopic image showed the highest specificity, 85.3% and 85.4%, respectively. The ABCD rule showed a specificity of 80.4%; the Menzies method, 77.7%; and the 7-point checklist, 73%. The Menzies method had a diagnostic accuracy of 81.1%; the ABCD rule, 79.0%; the 7-point checklist, 77.2%; pattern analysis, 76.8%; and clinical assessment, 73.2%.
  
  
  CONCLUSIONS
  All algorithms performed well in the hands of relatively inexpert practitioners who had undertaken self-guided training provided on compact disc. The Menzies method showed the highest diagnostic accuracy and sensitivity for melanoma diagnosis and was preferred by study participants.
authors.affiliation: Victorian Melanoma Service, Department of Dermatology, Alfred Hospital, Melbourne, Victoria, Australia. constantinos1@optusnet.com.au
authors.forename: Con
authors.initials: C
authors.lastname: Dolianitis
authors.forename: John
authors.initials: J
authors.lastname: Kelly
authors.forename: Rory
authors.initials: R
authors.lastname: Wolfe
authors.forename: Pamela
authors.initials: P
authors.lastname: Simpson
mesh_terms: D000465:Algorithms; D002983:Clinical Competence; D003880:Dermatology; D046169:Dermoscopy; D005194:Family Practice; D006801:Humans; D008545:Melanoma / Q000175:diagnosis* / Q000473:pathology; D009506:Nevus / Q000175:diagnosis / Q000473:pathology; D015588:Observer Variation; D012680:Sensitivity and Specificity; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology