DKK1 and neoplasm: Many of the coding genes are lung cancer or other cancer types related such as ADAMTS15 [44], ASB2 [45] and EPHX1 [46] with potential tumor suppressor roles; ANGPTL4 [47], ASCL2 [48], CCL20 [49], DKK1 [50], GRIK2 [51], LDHA [52], RGS20 [53], RHOQ [54], TLE1 [55] and WBP2 [56] with potential oncogenic roles; and CD200 [57], CD200R1 [57], CCDC181 [58], GNPNAT1 [59], IRX2 [60], LDLRAD3 [61], STAP1 [62], LINC00578 [63] with prognostic potential.