Abstract 3295
Background
NGS provides genetic information with potential impact on clinical practice. Plasma NGS has the advantage to reduce the need to repeat biopsy and provide information about tumor heterogeneity.
Methods
Since March 2018 we prospectively screened aNSCLCs consecutively referring to our institution for potential eligibility to VISION trial (NCT02864992). All the patients (pts) were previously screened for EGFR/ALK/ROS1 sensitizing alterations according to standard methods and positive cases were excluded. NGS was performed with METex14 Guardant360® covering 73 genes including all somatic alterations recognized as potential targets by NCCN. A parallel cohort of pts was also analysed with NGS in tissue by using METex14 Oncomine™ Focus Assay (MolecularMD) covering 59 genes. All identified druggable genetic alterations were tested for confirmation with a different method.
Results
We included 159 pts, 91 (57%) male, 37 (23,3%) smokers and 81 (50,9%) former smokers. Histology was: 144 adenocarcinoma, 7 squamous cell carcinoma, two sarcomatoid and 6 large cell/undifferentiated. 129 (81%) cases were analyzed in plasma and 63 (49%) had tissue NGS results for comparison. Median number of detected genetic alterations was 2 and maximum number was 17. No alterations were found in 14 cases (11%). Two of them were then retested and became positive. We found 34 (26%) potentially druggable genetic alterations and three of them showed discordant results between tissue and plasma. Among all druggable genetic alterations, till now we have treated 12 pts with targeted agents and six had already radiological response evaluable: five of them obtained control of disease. 18 pts with druggable alterations had already received immunotherapy (IT) and only two of them obtained objective response: METex14 mutation and RET rearrangement. We also found 5 cases of KRAS-STK11 co-mutations, three were treated with IT and no response was recorded. In parallel, 89 (56%) cases were analyzed in tissue and 44 (49%) were evaluable for NGS. Ten (23%) potentially druggable genetic alterations were found.
Conclusions
Plasma NGS was feasible and provided additional information: new druggable genetic alterations were found and potential impact of NGS on response to IT emerged.
Clinical trial identification
Editorial acknowledgement
Legal entity responsible for the study
Istituto Oncologico Veneto, IOV IRCCS.
Funding
Merck KGaA.
Disclosure
All authors have declared no conflicts of interest.
Resources from the same session
5877 - Efficacy of anti-PD(L)1 treatment in patients with metastatic urothelial cancer based on mRNA- and protein- based PD-L1 determination: Results from the multicentric, retrospective FOsMIC trial
Presenter: Jonas Jarczyk
Session: Poster Display session 3
Resources:
Abstract
5204 - A differential bladder microbiota composition is associated with tumor grade in bladder cancer.
Presenter: Monica Parra-Grande
Session: Poster Display session 3
Resources:
Abstract
4904 - Molecular characterization of metastatic urothelial carcinoma (mUC) in prior or current smokers (PCS) vs non-smokers (NS)
Presenter: Victor Sacristan Santos
Session: Poster Display session 3
Resources:
Abstract
5370 - Evaluation of different diagnostic methods for identification of FGFR alteration in advanced urothelial carcinomas: Proficiency Results based on multiple RNA extraction kits and mutation detection methods
Presenter: Veronika Weyerer
Session: Poster Display session 3
Resources:
Abstract
2579 - Title: Genomic characterization of non-schistosomiasis-related squamous cell carcinoma (NSR-SCC) of the urinary bladder: a retrospective study of potential prognostic and predictive biomarkers
Presenter: Esmail Al-ezzi
Session: Poster Display session 3
Resources:
Abstract
2203 - TiNivo: Tivozanib combined with nivolumab results in prolonged progression free survival in patients with metastatic renal cell carcinoma (mRCC). Final Results.
Presenter: Philippe Barthelemy
Session: Poster Display session 3
Resources:
Abstract
4712 - First-Line Pembrolizumab (pembro) Monotherapy for Advanced Non‒Clear Cell Renal Cell Carcinoma (nccRCC): Updated Follow-Up for KEYNOTE-427 Cohort B
Presenter: Cristina Suárez
Session: Poster Display session 3
Resources:
Abstract
2091 - First-Line Pembrolizumab (pembro) Monotherapy in Advanced Clear Cell Renal Cell Carcinoma (ccRCC): Updated Follow-Up For KEYNOTE-427 Cohort A
Presenter: James Larkin
Session: Poster Display session 3
Resources:
Abstract
2368 - Association Between Depth of Response and Overall Survival: Exploratory Analysis in Patients With Previously Untreated Advanced Renal Cell Carcinoma (aRCC) in CheckMate 214
Presenter: Viktor Grünwald
Session: Poster Display session 3
Resources:
Abstract
6008 - Quality of life in previously untreated patients with advanced renal cell carcinoma (aRCC) in CheckMate 214: updated results
Presenter: David Cella
Session: Poster Display session 3
Resources:
Abstract