Clinical correlation of circulating tumor cell (CTC) PD-L1 and HLA I expression in metastatic renal cell carcinoma (mRCC) using exclusion-based sample preparation technology.

721Background: Despite therapeutic advancement in Vascular endothelial growth factor receptor (VEGF-R) tyrosine kinase inhibitors (TKIs) and immune checkpoint inhibitors (ICIs) for mRCC treatment, ...