SMARCA4 and breast cancer: Furthermore, GAs related to SWI/SNF chromatin remodelling were frequent in BC (ARID1A, 23.3%), NSCLC (ARID1A, 6.4%; SMARCA4, 7.0%), CRC (ARID1A, 7.2%) and OC (ARID1A, 8.3%) but were rare in PC ( < 2.5%).