Occult Breast Carcinoma Presenting as Axillary Metastases, about Two Cases and Review of the Literature

Background: Occult breast cancer is a very rare type of cancer which presents with axillary lymphadenopathy with no visible mass in the breast, significant progress in breast imaging has taken place since its description, as well as its incidence.To date, optimal management of this type of cancer is lacking. Case Presentation:We report two cases of occult breast carcinoma diagnosed at the department of Medical Oncology after presenting an axillary nodule.No relevant anomalies in the breast or other organs were found.The treatment consisted of neoadjuvant chemotherapy, axillary surgery, breast radiotherapy, and hormone therapy.Conclusion: This case report demonstrates that histological and immunohistochemical results were crucial in identifying its mammary origin, The conservative approach (axillary lymph node dissection combined with breast radiotherapy) is currently the preferred approach when the breast MRI does not identify the primary lesion.