The therascreen EGFR Plus RGQ PCR Kit is an in vitro diagnostic real-time PCR test intended for the qualitative detection and identification of 42 mutations in exons 18, 19, 20 and 21 of the epidermal growth factor receptor (EGFR) gene in DNA samples extracted from plasma or formalin-fixed paraffin-embedded (FFPE) tumor tissue taken from non-small cell lung cancer (NSCLC) patients.