[A Long-Surviving Case of HER2-Positive Breast Cancer with Brain Metastasis Treated through Multidisciplinary Therapy].

We present a case of a 48-year-old woman who visited our hospital due to a lump in her left breast. She was diagnosed with HER2-positive, hormone-positive stage III A breast cancer. The patient underwent trastuzumab-based neoadjuvant chemotherapy and surgery(Bt+Ax). The pathological effect of neoadjuvant chemotherapy was Grade 1b. The patient underwent radiotherapy and was administered hormone therapy and adjuvant trastuzumab. Seven months postsurgery, the patient was taken to the hospital for loss of consciousness. Single brain metastasis with a diameter of 3 cm was found in the right frontal lobe with edema. She underwent surgery and was administered chemotherapy with lapatinib and capecitabine. Because of relapse of brain metastasis, she underwent 4 surgeries and 5 sessions of gamma-knife radiosurgery. She died 7 years after the detection of brain metastasis. The prolonged survival of this breast cancer patient with brain metastasis seems to be a result of multidisciplinary therapy, local therapy(surgery and radiation), and systemic therapy(chemotherapy). Cooperation between the radiation therapy department and the neurosurgery department was thought to be important for the treatment of the metastatic brain tumor.