EZH2 immunohistochemistry of representative human tissues. (A) Normal cervix; magnification, 100×. No positive staining. (B) Cervical adenocarcinoma; magnification, 200×. The EZH2 distribution score is 3, and the intensity score is 4. (C) Normal ovary; magnification, 100×. Weak positive staining is present. The distribution score is 2, and the intensity score is 1. (D) Ovarian papillary serous cystadenocarcinoma; magnification, 200×. The distribution score is 4, and the intensity score is 4.