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Electrical impedance spectroscopy as a potential adjunct diagnostic tool for cutaneous melanoma
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2013 (English)In: Skin research and technology, ISSN 0909-752X, E-ISSN 1600-0846, Vol. 19, no 2, 75-83 p.Article in journal (Refereed) Published
Abstract [en]

Background Previous studies have shown statistically significant differences in electrical impedance between various cutaneous lesions. Electrical impedance spectroscopy (EIS) may therefore be able to aid clinicians in differentiating between benign and malignant skin lesions. Objectives The aim of the study was to develop a classification algorithm to distinguish between melanoma and benign lesions of the skin with a sensitivity of at least 98% and a specificity approximately 20 per cent higher than the diagnostic accuracy of dermatologists. Patients/Methods A total of 1300 lesions were collected in a multicentre, prospective, non-randomized clinical trial from 19 centres around Europe. All lesions were excised and subsequently evaluated independently by a panel of three expert dermatopathologists. From the data two classification algorithms were developed and verified. Results For the first classification algorithm, approximately 40% of the data were used for calibration and 60% for testing. The observed sensitivity for melanoma was 98.1% (101/103), non-melanoma skin cancer 100% (25/25) and dysplastic nevus with severe atypia 84.2% (32/38). The overall observed specificity was 23.6% (66/280). For the second classification algorithm, approximately 55% of the data were used for calibration. The observed sensitivity for melanoma was 99.4% (161/162), for non-melanoma skin cancer was 98.0% (49/50) and dysplastic nevus with severe atypia was 93.8% (60/64). The overall observed specificity was 24.5% (116/474). Conclusion EIS has the potential to be an adjunct diagnostic tool to help clinicians differentiate between benign and malignant (melanocytic and non-melanocytic) skin lesions. Further studies are needed to confirm the validity of the automatic assessment algorithm.

Place, publisher, year, edition, pages
2013. Vol. 19, no 2, 75-83 p.
Keyword [en]
diagnostics, electric impedance, melanoma, sensitivity and specificity, skin cancer
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-200679DOI: 10.1111/srt.12008ISI: 000317937500003OAI: oai:DiVA.org:uu-200679DiVA: diva2:624789
Available from: 2013-06-03 Created: 2013-06-03 Last updated: 2013-06-03Bibliographically approved

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