Lapatinib activity in a patient with encephalic metastases from trastuzumab-resistant her-2 positive breast cancer

A 42-year-old woman with right breast cancer cT4dN2M0 HR +, HER2 +, undergoes mastectomy with axillary lymphadenectomy after neoadjuvant chemotherapy. During adjuvant treatment with trastuzumab and hormone therapy, the patient develops multiple symptomatic encephalic metastases. She undergoes panencephalic radiotherapy and begins chemotherapy with capecitabine and lapatinib. After three months of well tolerated therapy, an important volumetric response of encephalic metastases is observed, with regression of neurological symptoms.