AFP-producing carcinoma, hepatoid adenocarcinoma, and adenocarcinoma with enteroblastic differentiation of the stomach are also not formally defined, but hepatoid and enteroblastic adenocarcinomas seem to be histomorphological categories, while AFP-producing carcinoma seems to denote a loose collection of carcinomas with immunohistochemical or serological evidence of AFP production (52). Here, AFP is linked to hepatoid adenocarcinoma.