Clinical Utility of Plasma-Based Comprehensive Molecular Profiling in Advanced Non-Small-Cell Lung Cancer

Robert D Schouten, Daan C L Vessies, Linda J W Bosch, Nicole P Barlo, Anne S R van Lindert, Saskia A G M Cillessen, Daan van den Broek, Michel M van den Heuvel, Kim Monkhorst, Robert D Schouten, Daan C L Vessies, Linda J W Bosch, Nicole P Barlo, Anne S R van Lindert, Saskia A G M Cillessen, Daan van den Broek, Michel M van den Heuvel, Kim Monkhorst

Abstract

Comprehensive molecular profiling (CMP) plays an essential role in clinical decision making in metastatic non-small-cell lung cancer (mNSCLC). Circulating tumor DNA (ctDNA) analysis provides possibilities for molecular tumor profiling. In this study, we aim to explore the additional value of centralized ctDNA profiling next to current standard-of-care protocolled tissue-based molecular profiling (SoC-TMP) in the primary diagnostic setting of mNSCLC in the Netherlands.

Methods: Pretreatment plasma samples from 209 patients with confirmed mNSCLC were analyzed retrospectively using the NGS AVENIO ctDNA Targeted Kit (Roche Diagnostics, Basel, Switzerland) and compared with paired prospective pretreatment tissue-based molecular profiling from patient records. The AVENIO panel is designed to detect single-nucleotide variants, copy-number variations, insertions or deletions, and tyrosine kinase fusion in 17 genes.

Results: Potentially targetable drivers were detected with SoC-TMP alone in 34.4% of patients. Addition of clonal hematopoiesis of indeterminate potential-corrected, plasma-based CMP increased this to 39.7% (P < .001). Concordance between SoC-TMP and plasma-CMP was 86.6% for potentially targetable drivers. Clinical sensitivity of plasma-CMP was 75.2% for any oncogenic driver. Specificity and positive predictive value were more than 90% for all oncogenic drivers.

Conclusion: Plasma-CMP is a reliable tool in the primary diagnostic setting, although it cannot fully replace SoC-TMP. Complementary profiling by combined SoC-TMP and plasma-CMP increased the proportion of patients who are eligible for targeted treatment.

Conflict of interest statement

Kim Monkhorst Consulting or Advisory Role: Roche Molecular Diagnostics, MSD, AstraZeneca, AbbVie, Bristol Myers Squibb, Lilly, Boehringer Ingelheim, Bayer Speakers' Bureau: Quadia Research Funding: AstraZeneca, Roche Molecular Diagnostics, Personal Genome Diagnostics Travel, Accommodations, Expenses: Takeda No other potential conflicts of interest were reported. Kim Monkhorst Consulting or Advisory Role: Roche Molecular Diagnostics, MSD, AstraZeneca, AbbVie, Bristol Myers Squibb, Lilly, Boehringer Ingelheim, Bayer Speakers' Bureau: Quadia Research Funding: AstraZeneca, Roche Molecular Diagnostics, Personal Genome Diagnostics Travel, Accommodations, Expenses: Takeda No other potential conflicts of interest were reported.

© 2021 by American Society of Clinical Oncology.

Figures

FIG 1.
FIG 1.
Flow diagram of inclusion. In total, 209 patients had CMP, either tissue-based, plasma-based, or both. Fifteen of the initially selected 224 patients were ineligible. CMP, comprehensive molecular profiling; LEMA, Lung cancer Early Molecular Assessment; NGS, next-generation sequencing; NSCLC, non–small-cell lung cancer; SoC-TMP, standard-of-care protocolled tissue-based molecular profiling.

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Source: PubMed

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