Figure 3.
Summary of immunohistochemical findings. Only cases where information was available of individual markers are included. Estrogen receptor (ER) and progesterone receptor (PR) are nearly always negative, with PR as a more reliable negative marker. Mesonephric-like adenocarcinomas (MLAs) are characterized by staining with GATA binding protein 3 (GATA3) and/or thyroid transcription factor 1 (TTF1) with sometimes a reversed staining pattern. CD10 was predominantly positive in the tested cases but mostly focal. Calretinin is more often negative. All cases showed Paired box protein-8 (PAX8) positivity and p53 wild type expression. (*) = negative for TP53 mutation.