Abstract
In a recent study, we have demonstrated that real-time Raman spectroscopy could be used for skin cancer diagnosis. As a translational study, the objective of this study is to validate previous findings through a completely independent clinical test. In total, 645 confirmed cases were included in the analysis, including a cohort of 518 cases from a previous study, and an independent cohort of 127 new cases. Multi-variant statistical data analyses including principal component with general discriminant analysis (PC-GDA) and partial least squares (PLS) were used separately for lesion classification, which generated similar results. When the previous cohort (n = 518) was used as training and the new cohort (n = 127) was used as testing, the area under the receiver operating characteristic curve (ROC AUC) was found to be 0.889 (95 % CI 0.834–0.944; PLS); when the two cohorts were combined, the ROC AUC was 0.894 (95 % CI 0.870–0.918; PLS) with the narrowest confidence intervals. Both analyses were comparable to the previous findings, where the ROC AUC was 0.896 (95 % CI 0.846–0.946; PLS). The independent study validates that real-time Raman spectroscopy could be used for automatic in vivo skin cancer diagnosis with good accuracy.
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Acknowledgments
The project was supported in part by the Canadian Cancer Society, the Proof of Principle II grant co-funded by the Canadian Institutes of Health Research and Verisante Technology Inc., the Canadian Dermatology Foundation, the VGH & UBC Hospital Foundation, and the BC Hydro Employees Community Service Fund. Dr. David McLean, Wei Zhang, Mohammed AlJasser, and Soodabeh Zandi were acknowledged for consultation, recruiting patient, and clinical measurement.
Conflict of interest
J. Zhao, H. Lui, H. Zeng, and the British Columbia Cancer Agency hold Raman spectroscopy patents that are licensed to Verisante Technology Inc.
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Published in the topical collection Raman4Clinics with guest editors Jürgen Popp and Christoph Krafft.
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Zhao, J., Lui, H., Kalia, S. et al. Real-time Raman spectroscopy for automatic in vivo skin cancer detection: an independent validation. Anal Bioanal Chem 407, 8373–8379 (2015). https://doi.org/10.1007/s00216-015-8914-9
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DOI: https://doi.org/10.1007/s00216-015-8914-9