As previously mentioned, gastric-type endocervical adenocarcinomas morphologically resemble adenocarcinomas of the pancreatobiliary tract, with a similar immunohistochemical profile; one difference is that most, but not all, gastric-type endocervical adenocarcinomas express PAX8 (see below) 47. The gene discussed is PAX8; the disease is endocervical adenocarcinoma.