The thymic adenocarcinoma harbored many mutations, including ARID1A c.421del(p.A141Pfs∗91) (Fig. 3A), CTCF c.517G>T(p.G173∗) (Fig. 3B), KMT2A c.2155A>C(p.S719R) (Fig. 3C), BAP1 c.673G>A(p.D225N), ERBIN c.2900C>G(p.S967C), LZTR1 c.2216C>T(p.S739L), POLE c.52G>C(p.E18Q), and SRC c.1334A>C(p.K445T) (Supplemental Figure 1). Here, ARID1A is linked to thymus gland adenocarcinoma.