498PRetrospective evaluation of PD-L1 expression in tumor tissue of patients with lung carcinoma and correlation with clinical and demographical data from a tertiary care institute of northern India

Background: It has been widely recognized that response rates of immunotherapy drugs correlates with PD-L1 (Programmed Death-Ligand 1) expression with higher response rates with higher PD-L1 expression. As there is extreme paucity of PD-L1 expression data from the Indian perspective, we studied the clinical and demographical profile of PD-L1 in lung cancer patients.

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