PTEN and serous adenocarcinoma: Figure 3A shows that median expression of PTEN was significantly lower in tumor tissues (median score 85) compared to normal tissues (median score 132) (P = 0.0058). Figure 3 (B–E) shows examples of PTEN staining in normal endometrium (3B), endometrioid carcinoma (3C), serous carcinoma (3D), and clear cell carcinoma (3E).