SMARCA4 and small cell lung carcinoma: Unsupervised hierarchical clustering using a previously defined set of differentially expressed genes in primary SMARCA4-UT compared with SMARCA4-deficient NSCLC (24) revealed clustering of three SMARCA4-deficient SCLC-Y lines (H841, DMS114, SBC5) with primary thoracic SMARCA4-UT and SCCOHT (Fig. 4A).