260P Antitumor activity of trastuzumab deruxtecan (T-DXd) in patients with metastatic breast cancer (mBC) and brain metastases (BMs) from DAISY trial

N. Epaillard, A. Lusque, B. Pistilli, Fabrice André, T. Bachelot, J-Y Pierga, A. Ducoulombier, C. Jouannaud, F. Viret, L. Salabert, A.C. Johnson, E. Deluche, X. Durando, T. Petit, T. Filleron, Céline Mahier - Aït Oukhatar, V.C. Dieras, M.F. Mosele