In the study of Möller et al., the frequencies of TTF-1-positive gastric cancers were between 0% in gastric adenocarcinomas of diffuse type, and 5.9% in gastric adenocarcinomas of intestinal type, while gastric adenocarcinomas of mixed type revealed a TTF-1 positivity frequency of 5% [17]. This evidence concerns the gene TTF1 and gastric adenocarcinoma.