Liquid biopsies have the advantage of being largely non-invasive and providing a vast amount of information for the detection and monitoring of diseases such as cancer. This course will provide an overview in the several techniques to detect and analyse circulating tumour cells (CTCs), cell free tumor DNA (ctDNA), miRNA in liquid biopsies, cell free tumour RNA (ctRNA) and proteins. Participants will be introduced to all aspects ranging from proper sampling through error free sequencing to data analysis. Additional lectures will cover extracellular vesicles and clinical aspects using liquid biopsies, especially in the field of cancer diagnostics.