%0 Journal Article %J Polish Journal of Pathology %@ 1233-9687 %V 72 %N 1 %D 2021 %F Stolnicu2021 %T Endometrial adenocarcinoma with gastrointestinal differentiation – a newly described entity, with morphologic diversity %X Gastrointestinal type of endometrial carcinoma is a newly described entity for which clearly defined diagnostic criteria have only recently been published. Among morphologic criteria, gastrointestinal mucinous adenocarcinoma of endometrium must not show a typical endometrioid component. We present a case with morphologic diversity, with areas showing gastric and intestinal differentiation as well as an endometrioid-like component. However, the endometrioid-like component not only did not show classic squamous metaplasia, but was also MUC6-positive, while the positivity for ER/PR was only focal. The recognition of gastric/gastrointestinal differentiation in endometrial carcinomas is best accomplished using both morphology and immunohistochemistry rather than either alone. %A Stolnicu, Simona %A Podoleanu, Cristian %A Orban, Ildiko %A Francisc, Rozsnyai %P 84-86 %9 journal article %R 10.5114/pjp.2021.106446 %U http://dx.doi.org/10.5114/pjp.2021.106446