ARID1A and cancer: Furthermore, a pan-cancer essentiality analysis of ARID1A revealed the expected top five list of co-essential genes that are known mSWI/SNF complex members, namely ARID1A, SMARCB1, SMARCE1, SMARCC1, and SS18 (Mashtalir et al. 2018; Supplementary Fig. S2D and Table S1D).