Surprisingly, according to the databases in the HPA database, except for breast duct carcinoma (CAB017775), no KISS1 protein was detected in cancers like colon adenocarcinoma (HPA035542), hepatocellular carcinoma (HPA035542), lung adenocarcinoma (HPA035542), and prostate adenocarcinoma (HPA035542) (Figure 1d). This evidence concerns the gene KISS1 and lung adenocarcinoma.