The Tempus xT CDx is an innovative NGS-based in vitro diagnostic tool developed to aid in the detection of genetic variations within solid tumors. Offering a comprehensive analysis of 648 genes, it detects a range of genetic alterations such as substitutions, insertions, deletions, and microsatellite instability. The device serves as a companion diagnostic to identify patients who may benefit from targeted therapies and offers a deeper understanding of tumor mutation profiles. This test requires both tumor tissue and normal DNA samples, ensuring accurate detection of somatic mutations and facilitating personalized cancer treatment. Furthermore, by comparing tumor DNA with non-cancerous DNA, xT CDx provides a more precise analysis, reducing false-positive results and identifying actionable mutations for guiding therapy decisions.