- Programmed death-ligand 1 expression and tumor-infiltrating lymphocytes in non-small cell lung cancer: association with clinicopathologic parameters
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Gaurav Garg, Kuruswamy Thurai Prasad, Navneet Singh, Parul Gupta, Valliappan Muthu, Ashim Das, Amanjit Bal
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J Pathol Transl Med. 2021;55(6):398-405. Published online October 6, 2021
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DOI: https://doi.org/10.4132/jptm.2021.08.08
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 Abstract
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- Background
Data on the prevalence of programmed death-ligand 1 (PD-L1) expression and tumor-infiltrating lymphocytes (TILs) in non–small cell lung cancer (NSCLC) and their clinical significance in Indian patients are limited.
Methods
Newly diagnosed NSCLC cases (adenocarcinoma or squamous cell carcinoma [SqCC] histology) were included in the present study. The TILs were evaluated based on morphology on hematoxylin and eosin–stained slides. PD-L1 expression in tumors was assessed using immunohistochemistry with rabbit monoclonal antibody (SP263) on the Ventana automated immunostainer. Tumors with PD-L1 expression > 50% on tumor cells were considered PD-L1–positive. Tumors in which TILs occupy > 25% of stroma were considered to have high TILs. The association of PD-L1 expression and TILs with various clinical parameters including overall survival (OS) was investigated.
Results
The present study included 128 cases of NSCLC (67 adenocarcinoma, 61 SqCC). PD-L1 positivity was observed in 17.2% of the patients with NSCLC. Baseline characteristics of PD-L1–positive subjects were similar to PD-L1–negative subjects except for a higher prevalence of liver metastasis (18.2% vs. 2.8%; p = .018) and a higher probability of diagnosis from extrapulmonary biopsies. High TILs were observed in 26.6% of the subjects. However, PD-L1 expression and high TIL did not affect OS.
Conclusions
PD-L1 positivity and high TILs were observed in 20% and 25% of the patients with NSCLC, respectively, however, neither were predictors of survival in SqCC.
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Citations
Citations to this article as recorded by  - Real-world prevalence of PD-L1 expression in non-small cell lung cancer: an Australia-wide multi-centre retrospective observational study
Prudence A. Russell, Alexandra L. Farrall, Sarita Prabhakaran, Khashayar Asadi, Wade Barrett, Caroline Cooper, Wendy Cooper, Samuel Cotton, Edwina Duhig, Matthew Egan, Stephen Fox, David Godbolt, Shilpa Gupta, Aniza Hassan, Connull Leslie, Trishe Leong, D
Pathology.2023; 55(7): 922. CrossRef
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