ARID1A and neoplasm: Moreover, we confirmed the mutation in ARID1A gene (p.R1276∗), ERBB3 (p.S128R), KEAP1 (p.R135H), PALB2 (p.P807S), and NTRK1 (p.Q736X), previously reported by F1CDx, both in the tumor and in the ccfDNAs.