PD-L1 expression and its significance in advanced NSCLC: real-world experience from a tertiary care center.

Autor: Kilaru, Sindhu, Panda, Soumya Surath, Moharana, Lalatendu, Mohapatra, Debahuti, Mohapatra, Satya Sundar G., Panda, Adyakinkar, Kolluri, Spoorthy, Devaraj, Suma, Biswas, Ghanashyam
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Zdroj: Journal of the Egyptian National Cancer Institute; 1/29/2024, Vol. 36, p1-7, 7p
Abstrakt: Background: Targeted therapies against programmed death ligand-1 (PD-L1) in non-small cell lung cancer (NSCLC) have revolutionized the management in recent years. There is paucity of data on the significance of PD-L1 expression in NSCLC from India. We aimed to study the prevalence of PD-L1 expression and its relation with different clinico-pathological parameters in advanced NSCLC from a tertiary care center in Eastern India. Methods: All consecutive patients with advanced NSCLC diagnosed from January 2020 to December 2021 were prospectively evaluated for PD-L1 expression in formalin fixed-paraffin embedded tumor tissue specimens using immunohistochemistry analysis. A PD-L1 expression of < 1%, 1–49%, and ≥ 50% were considered negative, low, and high expression positive respectively, and association with various parameters was performed. Results: Out of the 94 patients (mean age 59.6 ± 14 years and 63.8% males), PD-L1 positivity was seen in 42 (44.7%) patients, with low positivity (1–49%) in 29 patients and high positivity (≥ 50%) in 13 patients. Epidermal Growth Factor Receptor (EGFR) mutations were seen in 28 patients (29.8%). There were no significant differences in PD-L1 positivity with respect to gender, age, and molecular mutation status. PD-L1 positivity was significantly associated with tobacco use (p = 0.04), advanced tumor stage (p < 0.001), and higher nodal stage (p < 0.001). Median overall survival in the cohort was 17 months and it was not significantly different between the PD-L1 positive and negative groups. Conclusions: Forty-five percent of advanced NSCLC patients in our cohort showed positive PD-L1 expression and it is associated with tobacco use and aggressive tumor characteristics. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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