Clinical Application of Genomic Profiling With Circulating Tumor DNA for Management of Advanced Non-Small-cell Lung Cancer in Asia
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Genomic profiling of cell-free circulating tumor DNA (ctDNA) is a potential alternative to repeat invasive biopsy in patients with advanced cancer. We report the first real-world cohort of comprehensive genomic assessments of patients with non–small-cell lung cancer (NSCLC) in a Chinese population.
Patients and Methods:
We performed a retrospective analysis of patients with advanced or metastatic NSCLC whose physician requested ctDNA-based genomic profiling using the Guardant360 platform from January 2016 to June 2017. Guardant360 includes all 4 major types of genomic alterations (point mutations, insertion-deletion alterations, fusions, and amplifications) in 73 genes.
Genomic profiling was performed in 76 patients from Hong Kong during the 18-month study period (median age, 59.5 years; 41 men and 35 women). The histologic types included adenocarcinoma (n = 10), NSCLC, not otherwise specified (n = 58), and squamous cell carcinoma (n = 8). In the adenocarcinoma and NSCLC, not otherwise specified, combined group, 62 of the 68 patients (91%) had variants identified (range, 1-12; median, 3), of whom, 26 (42%) had ≥ 1 of the 7 National Comprehensive Cancer Network–recommended lung adenocarcinoma genomic targets. Concurrent detection of driver and resistance mutations were identified in 6 of 13 patients with EGFR driver mutations and in 3 of 5 patients with EML4-ALK fusions. All 8 patients with squamous cell carcinoma had multiple variants identified (range, 1-20; median, 6), including FGFR1 amplification and ERBB2 (HER2) amplification. PIK3CA amplification occurred in combination with either FGFR1 or ERBB2 (HER2) amplification or alone.
Genomic profiling using ctDNA analysis detected alterations in most patients with advanced-stage NSCLC, with targetable aberrations and resistance mechanisms identified. This approach has demonstrated its feasibility in Asia.
Acceptance Date24/04/2018
All Author(s) ListLoong HH, Raymond VM, Shiotsu Y, Chua DTT, Teo PML, Yung T, Skrzypczak S, Lanman RB, Mok TSK
Journal nameClinical Lung Cancer
Volume Number19
Issue Number5
Place of PublicationUnited States
Pagese601 - e608
LanguagesEnglish-United Kingdom

Last updated on 2020-05-07 at 00:49