The general aim of this thesis was to determine the optimal workflow of circulating cell-free nucleic acid- (cfNA) based liquid biopsy for implementation in routine clinical practice. We started by evaluating several pre-analytical variables of the liquid biopsy workflow. We examined several cfDNA isolation kits, determined the optimal centrifugation protocol for both cfDNA and cfRNA, and determined the cfDNA stabilising efficiency of (specialised) blood collection tube (BCT). Next, we focused on the clinical applicability of liquid biopsy in non-small cell lung cancer (NSCLC). Based on this work, we specified recommendations regarding (pre-) analytical and biological variables to ensure successful liquid biopsy analysis.

(BELG J MED ONCOL 2021;15(1):48-50)