In concordance with histological observations on tissue samples, a subset of SCLC cell lines positive for NEUROD1 (CORL279, H2066, and DMS53; 3 of 38 (8%)), which had been previously assigned as SCLC-N [11], showed ASCL1 expression comparable to that in SCLC-A (Fig. 1C). The gene discussed is ASCL1; the disease is small cell lung carcinoma.