ABCG2 and small cell lung carcinoma: There were fourteen enriched and cancer-related signaling pathways: ECM receptor interaction, calcium signaling pathway, focal adhesion, basal cell carcinoma, Hedgehog signaling pathway, MAPK signaling pathway, TGF-beta signaling pathway, pathway in cancer, cell adhesion molecule, renal cell carcinoma, JAK-STAT signaling pathways, ABC transporter, small cell lung cancer, and Wnt signaling pathways (Table 3 and Figure 6).