SMARCA1 and non-small cell lung carcinoma: 3.1.4 A codeficiency of two or more subunits of the SWI/SNF complex was observed in 1.2% (29/2390) of NSCLC cases: 7 cases for SMARCA2 and SMARCA4; 6 cases for SMARCA2 and ARID1A; 3 cases for SMARCA2 and ARID1B; 3 cases for SMARCA4 and ARID1A; 7 cases for SMARCA2, SMARCA4 and ARID1A; 2 cases for SMARCA2, SMARCA4 and ARID1B; and 1 case for SMARCA2, SMARCA4, ARID1A and ARID1B (Table 2).