Correlative imaging of cutaneous tumors provides additional information to the standard histopathologic examination. However, the joint progress in the establishment of analytical techniques, such as Laser-Induced Breakdown Spectroscopy (LIBS) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) in clinical practice is still limited. Their combination provides complementary information as it is also shown in our study in terms of major biotic (Ca, Mg, and P) and trace (Cu and Zn) elements. To elucidate changes in the elemental composition in tumors, we have compiled a set of malignant tumors (Squamous Cell Carcinoma, Basal Cell Carcinoma, Malignant Melanoma, and Epithelioid Angiosarcoma), one benign tumor (Pigmented Nevus) and one healthy-skin sample. The data processing was based on a methodological pipeline involving binary image registration and affine transformation. Thus, our paper brings a feasibility study of a practical methodological concept that enables us to compare LIBS and LA-ICP-MS results despite the mutual spatial distortion of original elemental images. Moreover, we also show that LIBS could be a sufficient pre-screening method even for a larger number of samples according to the speed and reproducibility of the analyses. Whereas LA-ICP-MS could serve as a ground truth and reference technique for preselected samples.

Central European Institute of Technology Brno University of Technology Purkyňova 123 612 00 Brno Czech Republic

Central European Institute of Technology Brno University of Technology Technická 2 896 616 69 Brno Czech Republic

Charles University Faculty of Medicine in Hradec Králové Academic Department of Surgery Šimkova 870 500 03 Hradec Králové Czech Republic; Charles University 3rd Faculty of Medicine Department of Plastic Surgery Ruská 2411 100 00 Praha 10 Czech Republic; Surgical Department Faculty of Medicine in Hradec Králové Charles University and University Hospital Hradec Králové Sokolská 581 500 05 Hradec Králové Czech Republic

Charles University Faculty of Medicine in Hradec Králové Academic Department of Surgery Šimkova 870 500 03 Hradec Králové Czech Republic; Surgical Department Faculty of Medicine in Hradec Králové Charles University and University Hospital Hradec Králové Sokolská 581 500 05 Hradec Králové Czech Republic

Charles University Faculty of Medicine in Hradec Králové Academic Department of Surgery Šimkova 870 500 03 Hradec Králové Czech Republic; The Fingerland Department of Pathology Faculty of Medicine in Hradec Králové Charles University and University Hospital Hradec Králové Sokolská 581 500 05 Hradec Králové Czech Republic

The Fingerland Department of Pathology Faculty of Medicine in Hradec Králové Charles University and University Hospital Hradec Králové Sokolská 581 500 05 Hradec Králové Czech Republic

TU Wien Institute of Chemical Technologies and Analytics Getreidemarkt 9 164 1 AC 1060 Vienna Austria

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