Bilateral Breast and Ovarian Metastases of Signet-ring Cell Gastric Cancer: A Case Report and Literature Review

Abstract Background Breast cancer metastasis accounts for only 0.4–2% of all breast cancer cases. Gastric cancer with breast metastases is extremely rare, while mammary and ovarian metastases from the stomach are even more uncommon. Breast metastases might be mistaken for primary cancer due to their uncommon and generic clinical and radiological symptoms, leading to ineffective and debilitating therapy. Case Presentation: We present a 43-year-old woman with bilateral multiple metastases from stomach signet-ring cell carcinoma to the breast and ovary, which is the seventh case to our knowledge. Conclusion We highlight the epidemiological, diagnostic, therapeutic, and prognostic aspects of this extremely rare disease through our case, which are critical to understand in order to avoid diagnostic errors and subsequent incorrect care.