GPT and gastric carcinoma: The study also found that cases with hTERT-positive but APBs-negative were more common in non-MSI-H gastric carcinomas (76%) than in MSI-H gastric carcinomas (24%), while cases with hTERT-negative but APBs-positive were more common in MSI-H gastric carcinomas (33%) than in non-MSI-H cases (10%) suggesting that the mismatch repair system defects may contribute to ALT-TMM through homologous recombination of telomeric ends in gastric carcinomas.