The similar CK7+/CK20- phenotype in both the gastric in situ adenocarcinoma site and the gastric heterotopic pancreas in situ carcinoma site doesn't correspond to the study by Duval et al. [13], which showed the CK7+/CK2O- phenotype in about 96% carcinomas of the pancreas. The gene discussed is KRT7; the disease is familial pancreatic carcinoma.