CCL7 and non-small cell lung carcinoma: In addition, we found that the levels of CCL7 were significantly higher in patients who exhibited PR or SD to anti-PD-1 therapies than those who exhibited PD, indicating that CCL7 in addition to PD-L1 in the TME as a potential predictive marker for anti-PD-1/PD-L1 checkpoint immunotherapies of NSCLC patients.