Advanced-stage ovarian cancer typically presents with peritoneal dissemination or retroperitoneal lymph node metastases, and distant metastases are very rare. However, ovarian cancer can sometimes metastasize to the liver, pleura, or lungs, which is less common, and the prognosis for these patients is generally poor. The incidence of primary ovarian cancer metastasizing to the breast is very rare, about 0.07%. The time of detection of breast metastases from the initial diagnosis of primary ovarian cancer is approximately two years, with the predominant histological type being serous epithelial ovarian cancer. We report a clinical case of ovarian cancer with the histological type being serous epithelial cancer metastasizing to the breast, diagnosed at the same time as the primary ovarian cancer, and review the literature.

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