[A Case of Spinal Cord Metastasis from Breast Cancer Successfully Treated with Trastuzumab Deruxtecan].

Objective: Intramedullary spinal cord metastases(ISCM)are very rare in patients with breast cancer and have a poor prognosis with no established treatment. We report a case of ISCM in a patient with HER2-positive breast cancer who was successfully treated with a novel anti-HER2 agent, trastuzumab deruxtecan(T-DXd, ENHERTU®).

Case: The patient was a 44- year-old woman who underwent surgery for right breast cancer.