EZH2 and small cell lung carcinoma: Comprehensive gene expression analyses from the NCBI GEO data set revealed that SCLC cells and SCLC tissues displayed higher expression of the enhancer of zeste 2 (EZH2), SUZ12 polycomb repressive complex 2 subunit (SUZ12), and embryonic ectoderm development (EED) than normal lung epithelial cells and normal lung tissues, respectively (Figure 3a, and Supplementary Figure S3).