Nectin-4 expression varied among the different cell lines analyzed and was clearly detected in eight of the 14 tested NSCLC cell lines (ABC1, NCI-H441, NCI-H2170, NCI-H358, Calu-3, PC14, A431, and NCI-H1666), and in one (SBC-2) of the eight tested SCLC cell lines (Figure 1). This evidence concerns the gene NECTIN4 and small cell lung carcinoma.