CD274 and neoplasm: To rule out that increased frequencies of suppressive myeloid cells in ICB NR tumors are a result of increased tumor size independent of treatment rather than a mechanism of ICB resistance, we correlated MRI3 tumor volumes with frequencies of tumor-associated CD45highCD11b+ cells and percentage of PD-L1+ cells on tumor-associated CD45highCD11b+ cells in ICB and C-treated mice.