CBX2 and ovarian serous adenocarcinoma: Furthermore, elevated expression of CBX2 mRNA was shown to be involved in both poor OS (HR = 1.47 (1.11 - 1.95), P = 0.0066) and PFS (HR = 1.51 (1.18 - 1.93), P = 0.0010) for serous ovarian cancer patients.