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Temporal and spatial discordance of programmed cell death-ligand 1 expression and lymphocyte tumor infiltration between paired primary lesions and brain metastases in lung cancer

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Mansfield, A.S., Aubry, M.C., Moser, J.C., Harrington, S.M., Dronca, R.S., Park, S.S., Dong, H.·2016·Annals of Oncology

Abstract

BACKGROUND: The dynamics of PD-L1 expression may limit its use as a tissue-based predictive biomarker. We sought to expand our understanding of the dynamics of PD-L1 expression and tumor-infiltrating lymphocytes (TILs) in patients with lung cancer-related brain metastases. EXPERIMENTAL DESIGN: Paired primary lung cancers and brain metastases were identified and assessed for PD-L1 and CD3 expression by immunohistochemistry. Lesions with 5% or greater PD-L1 expression were considered positive. Agreement statistics and the χ(2) or Fisher's exact test were used for analysis. RESULTS: We analyzed 146 paired lesions from 73 cases. There was disagreement of tumor cell PD-L1 expression in 10 cases (14%, κ = 0.71), and disagreement of TIL PD-L1 expression in 19 cases (26%, κ = 0.38). Most paired lesions with discordant tumor cell expression of PD-L1 were obtained 6 or more months apart. When specimens were categorized using a proposed tumor microenvironment categorization scheme based on PD-L1 expression and TILs, there were significant changes in the classifications because many of the brain metastases lacked either PD-L1 expression, tumor lymphocyte infiltration or both even when they were present in the primary lung cancer specimens (P = 0.009). CONCLUSIONS: We identified that there are significant differences between the tumor microenvironment of paired primary lung cancers and brain metastases. When physicians decide to treat patients with lung cancer with a PD-1 or PD-L1 inhibitor, they must do so in the context of the spatial and temporal heterogeneity of the tumor microenvironment.

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Metadata

Authors
Mansfield, A. S., Aubry, M. C., Moser, J. C., Harrington, S. M., Dronca, R. S., Park, S. S., & Dong, H.
Venue
Annals of Oncology
Publisher
Elsevier BV
Published
2016-10
Volume
27
Issue
10
Pages
1953-1958
ISSN
0923-7534 (ISSN-L)
OpenAlex
W2493219106
Cited by
336
References
28
FWCI
17.77
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Temporal and spatial discordance of programmed cell death-ligand 1 expression and lymphocyte tumor infiltration between paired primary lesions and brain metastases in lung cancer. https://app.cochat.ai/papers/10.1093/annonc/mdw289
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Mansfield, A. S., Aubry, M. C., Moser, J. C., Harrington, S. M., Dronca, R. S., Park, S. S., & Dong, H. (2016). Temporal and spatial discordance of programmed cell death-ligand 1 expression and lymphocyte tumor infiltration between paired primary lesions and brain metastases in lung cancer. Annals of Oncology. https://doi.org/10.1093/annonc/mdw289

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