GPT and gastric carcinoma: Moreover, in multiple epithelial cancer types, the ALT phenotype was detected with varying prevalence rates, signifying its diverse occurrence among different types of epithelial cancers such as urinary bladder carcinomas (7%) (37), breast carcinomas (2%) (38), MSI-H gastric carcinomas (57%) (39), and hepatocellular carcinoma (7%) (37).