EP3 expression among the different histological subtypes exhibited decreasing density for from undifferentiated (median = 45.5%), over mucinous cancer (median = 45%), serous carcinoma (median = 30%), mixed cell (median = 10%), and endometrioid histology (median = 7.5%), although the differences were not significant (Figure 1F-1I). The gene discussed is PTGER3; the disease is serous adenocarcinoma.