Comparing control and gastric cancer cases, we identified the most common genes and the chromosome positions that involved gastric-cancer progression including TP73-gene, TP73-AS1 and CEP104 at chromosome 1q36.32 homozygous loss that is common in two cases (6 and 8), and also for the same chromosome at 1q36.1, gene CDK18 found homozygous loss that is a primary cause of gastric-cancer. Here, CEP104 is linked to gastric cancer.