Another important aspect in the context of our studies is the fact that in studies conducted with populations of Western countries, a positive correlation between low ghrelin concentration and the incidence of gastric adenocarcinoma, esophagogastric junctional adenocarcinoma, esophageal squamous cell carcinoma, and colorectal adenocarcinoma was confirmed [69,70]. The gene discussed is GHRL; the disease is esophageal squamous cell carcinoma.