3.2. bTMB as a Biomarker for Atezolizumab Response
Among the 100 cfDNA samples, cfDNA concentration was measured in 86 samples; the samples that failed quality control (The median value of bTMB in the ctDNA BEP (There was no difference in the PFS according to the bTMB level at C0; however, the subgroup with no change or decreased bTMB levels from C0 to C4/EOT had a longer PFS compared with the subgroup with increased bTMB levels (