Clinical characteristics and prognostic factors analysis of patients stricken with double primary breast and ovarian cancer based on the SEER database

CONCLUSIONS: OC primarily determines the survival outcomes of DPBOC. Patients with BC as the first primary cancer (FPC) have a worse prognosis than patients with OC as FPC. After a diagnosis of BC or OC, we should pay close attention to another site, particularly after BC diagnosis, and monitor screening for ovarian lesions as early as feasible, as well as strengthening the treatment for OC.