RT Journal Article T1 PD-L1 testing based on the SP142 antibody in metastatic triple-negative breast cancer: summary of an expert round-table discussion. A1 Peg, Vicente A1 López-García, María Ángeles A1 Comerma, Laura A1 Peiró, Gloria A1 García-Caballero, Tomás A1 López, Ángel Concha A1 Suárez-Gauthier, Ana A1 Ruiz, Irune A1 Rojo, Federico K1 PD-L1 K1 antibody K1 breast cancer K1 diagnosis K1 immunohistochemistry K1 immunotherapy AB Triple-negative breast cancer (TNBC) is more aggressive than other breast cancer subtypes. TNBC is characterized by increased expression of Programmed Death-ligand 1 (PD-L1), a signal used by many tumors to escape the immune response. Expression of PD-L1 is a positive predictor of response to immunotherapy; therefore, it should be investigated in TNBC in order to select patients who may benefit from anti-PD-L1 therapies. While many PD-L1 assays are available, only the VENTANA platform with the anti-PD-L1 (SP142) antibody is licensed as a companion diagnostic device for selecting patients with metastatic/advanced TNBC who are candidates for treatment with atezolizumab. In this article, we provide a summary of an expert round-table discussion about PD-L1 testing, using the SP142 antibody in metastatic TNBC. YR 2020 FD 2020-12-08 LK http://hdl.handle.net/10668/16754 UL http://hdl.handle.net/10668/16754 LA en DS RISalud RD Mar 14, 2025