Abstract
The ex-vivo confocal laser scanning microscopy (ex-vivo CLSM) is a novel diagnostic method for fresh tissue examination, which has already shown promising results in the evaluation of healthy skin and different skin tumors. In malignant melanoma, the histological tumor thickness plays an essential role for further treatment strategies. The immediate perioperative measurement of tumor thickness by means of ex-vivo CLSM might accelerate the decision for further operating procedures in malignant melanoma. Ten histologically confirmed malignant melanomas from various donor sites were blindly examined by two investigators via ex-vivo CLSM and conventional light microscopy. The histopathological tumor thickness (HTT) and confocal tumor thickness (CTT) were measured independently and evaluated using correlation curves, Spearman’s correlation coefficient, and Bland-Altman plots. Bland-Altman plots for HTT and reflectance-mode CTT, as well as for fluorescence-mode CTT, showed high correlations. Spearman’s correlation coefficient of HTT and CTT was 1.00 in FM and RM. The mean difference of RM-CTT and FM-CTT versus HTT was 0.09 ± 0.30 mm and 0.19 ± 0.35 mm. In one case, the HTT was identical to the CTT in both modes. This pilot study shows high conformity of CTT and HTT measured in malignant melanoma underlining the potential of ex-vivo CLSM for perioperative decisions on safety margin excisions of malignant melanoma in the future.
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We would like to thank Mr. Sebastian Harraßer for his expert support and experimental assistance.
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The trial was conducted following the principles of Helsinki.
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The Vivascope® device was provided by Mavig GmbH for the time of the study from August to October 2015. The authors declare that they have no conflict of interest.
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Informed consent was obtained from all individual participants included in the study.
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Daniela Hartmann and Sebastian Krammer contributed equally to this work.
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Hartmann, D., Krammer, S., Ruini, C. et al. Correlation of histological and ex-vivo confocal tumor thickness in malignant melanoma. Lasers Med Sci 31, 921–927 (2016). https://doi.org/10.1007/s10103-016-1936-5
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DOI: https://doi.org/10.1007/s10103-016-1936-5