On 8 March 2019, the FDA granted accelerated approval to atezolizumab (Tecentriq®, Genentech/Roche) in combination with albumin-bound paclitaxel (nab-paclitaxel) for the treatment of adult unresectable locally advanced or metastatic triple-negative breast cancer (TNBC) patients with programmed death 1 ligand (PD-L1) stained tumour-infiltrating immune cells (IC) of any intensity covering ≥1% of the tumour area, as determined by the VENTANA PD-L1 (SP142) Assay companion diagnostic (CDx).