“…In the 53 eligible studies, 21 studies used next-generation sequencing (NGS) to test BRAF mutation in plasma sample, while this number was 13 for digital PCR, 16 for conventional PCR, and 3 for MassARRAY (Table 1). For the testing of BRAF mutation in paired tissue sample, more than half (30 out of 53) Gupta et al, 2020 [15] 75 Colorectal cancer NGS NGS America Tzanikou et al, 2020 [16] 34 Melanoma Digital PCR Sanger sequencing Europe Nguyen et al, 2020 [26] 50 Colorectal cancer NGS NGS Asia García-Romero et al, 2019 [46] 13 Central nervous system tumors Digital PCR Sanger sequencing Europe Maurel et al, 2019 [51] 178 Colorectal cancer PCR PCR Europe Wong et al, 2017 [32] 52 Melanoma NGS NGS Australia Iyer et al, 2018 [19] 44 Thyroid carcinoma NGS NGS America Diefenbach et al, 2019 [27] 10 Melanoma NGS NGS Australia Li et al, 2019 [47] 59 Thyroid carcinoma Digital PCR Digital PCR Asia Choi et al, 2019 [20] 61 Colorectal cancer NGS NGS America Sakai et al, 2015 [33] 15 Colorectal cancer NGS NGS Asia Lin et al, 2014 [17] 191 Colorectal cancer MassARRAY MassARRAY Asia Spindler et al, 2013 [55] 94 Colorectal cancer PCR PCR Europe Leighl et al, 2019 [21] 92 Lung cancer NGS Standard of care America Mas et al, 2019 [28] 405 Colorectal cancer NGS Standard of care Europe Haselmann et al, 2018 [49] 187 Melanoma Digital PCR Sanger sequencing Europe Liebs et al, 2019 [39] 53 Colorectal cancer Digital PCR Digital PCR Europe Tang et al, 2018 [48] 57 Melanoma Digital PCR Standard of care Asia Mohrmann et al, 2018 [40] 41 Mixed type Digital PCR Standard of care America Gangadhar et al, 2018 [34] 25 Melanoma NGS NGS America Long-Mira et al, 2018 [52] 19 Melanoma PCR Pyrosequencing Europe Sclafani et al, 2018 [41] 97 Colorectal cancer Digital PCR PCR Europe Thierry et al, 2017 [63] 97 Colorectal cancer PCR Standard of care Europe Mithraprabhu et al, 2017 [30] 48 Multiple myeloma NGS NGS Australia Sandulache et al, 2017 [22] 23 Thyroid carcinoma NGS NGS America Wang et al, 2017 [35] 103 Lung cancer NGS PCR Asia Yang et al, 2017 [65] 107 Lung cancer PCR PCR Asia Kidess-Sigal et al, ...…”