Large mirror brain metastases from primary undifferentiated sarcoma of the breast: case report and review of the literature.

Primary breast sarcomas are rare high-grade tumors with a reported incidence of <1% of breast malignancies. Its dissemination to the CNS is exceptional and only one is found in the literature. The authors described the case of a 22-year-old female with history of a breast undifferentiated sarcoma that present with two large bilateral retrolenticular brain metastases. Both lesions were excised in the same procedure and she underwent adjuvant therapy. She died 24 months after surgery. Despite being aggressive lesions, aggressive treatment of primary breast sarcomas including brain metastases excision, should be considered in order to improve overall survival.