CD274 and neoplasm: Additionally, autoradiography and IHC of post-imaging tumor biopsies correlated with the outcome of PET imaging with the PD-L1-targeting tracer [89Zr]Zr-N-sucDf-atezolizumab, and tracer uptake appeared to be a good predictor for treatment response with atezolizumab (including progression-free survival and overall survival) [37].