The ctDx FIRST assay uses novel propriety technology to detect genomic alterations in circulating tumor DNA (ctDNA) from plasma. This minimally invasive approach is preferred by 90% of cancer patients compared to more invasive tissue biopsy tests. In addition, liquid biopsy overcomes some limitations encountered with tissue-based methods providing a notably faster turn-around time to potentially accelerate treatment decisions. The ctDX FIRST test report includes broad genomic profiling on 109 genes across four types of alterations: single nucleotide variants (SNVs), insertions and deletions (indels), copy number amplifications (CNAs), and fusions.