BACKGROUND New technologies, such as confocal laser scanning microscopy (CLSM), optical coherence tomography (OCT), electrical impedance spectroscopy (EIS) and multispectral analysis have greatly enriched the possibilities of diagnostics in dermatological oncology. They can be supplementary tools to dermatoscopy and histopathology to make a more precise diagnosis of skin lesions. OBJECTIVE Increasing relevance of new systems for diagnosis and monitoring of dermatological therapy. Presentation of the technology and the diagnostic range of application for various skin lesions. METHODS Presentation of scientifically relevant studies and statistical data, discussion of basic research and expert recommendations. RESULTS The diagnostic spectrum of dermatological oncology has been significantly enriched in recent years. New technologies, such as CLSM, OCT, EIS and multispectral analysis are non-invasive and therefore painless for the patient. In only a few minutes these techniques deliver valid data and findings and provide dermatologists with more accurate diagnostic information about benign or malignant melanocytic skin lesions or the various forms of white skin cancer. CONCLUSIONS In recent years, non-invasive diagnostic and analytical imaging procedures have been progressively established in dermatological oncology and supplement classical dermatoscopy and histopathology. With respect to the follow-up of different therapeutic modalities unnecessary tissue biopsies and scars can be reduced for patients.