On the other hand, proteins overexpressed in type A thymomas, such as MYL9, ROCK2, CDH1, RRAS2, GNG12, EGFR, ITGB1, BRK1, SEPT5, and NRP1, were mapped to canonical pathways including IL‐8, Rho family GTPase, and epithelial adherens junction signaling. Here, BRK1 is linked to thymoma type A.