Abstract 6007
Background
Osimertinib has been shown to be superior to erlotinib or gefitinib in previously untreated patients with EGFR mutant (exon 19 deletion/L858R) NSCLC. Osimertinib is approved for the treatment of patients with metastatic T790M+ NSCLC who have disease progression after EGFR-TKI therapy. The majority of EGFR mutant NSCLC patients who are treated with a TKI ultimately acquire resistance, including those treated with osimertinib. We have recently completed a phase 2 randomized clinical trial demonstrating that patients with oligometastatic NSCLC treated with aggressive local consolidation therapy (surgery or radiation) have improved progression-free survival compared to those patients treated with systemic therapy alone (Gomez et al., Lancet Oncol, 2016). A retrospective review of EGFR-mutant subset of patients enrolled in the trial suggests that EGFR-mutant patients may derive greater benefit from this approach. Thus, two premises underlie the current randomized trial: 1) osimertinib is standard of care for treatment of primary and TKI resistant EGFR-mutant metastatic NSCLC, and 2) the majority of patients treated with osimertinib ultimately become resistant, and LCT has been found to improve outcomes compared to systemic therapy alone.
Trial design
A phase 2 randomized, multicenter, study to evaluate the efficacy of osimertinib with or without LCT for patients with EGFR-mutant metastatic NSCLC. Eligible patients include 1) Previously untreated patients with EGFR-mutant NSCLC (L858R or exon 19 deletion) or 2) NSCLC patients with acquired EGFR T790M that was acquired following progression on first or second generation TKI, this subset of patients must have not received prior third generation TKI. Patients who don’t have disease progression after 6-12 weeks of induction osimertinib will be randomized 1:1 to osimertinib continuation or to osimertinib continuation with LCT Primary end point is progression free survival Exploratory biomarkers associated with resistance to osimertinib will be evaluated in tumor tissue and plasma collected at baseline and progression. 140 patients will be enrolled in 5 centers in North America.
Clinical trial identification
NCT03410043.
Legal entity responsible for the study
UT MD Anderson Cancer Center.
Funding
National Comprehensive Cancer Network NCCN, AZ grant.
Editorial Acknowledgement
Disclosure
All authors have declared no conflicts of interest.
Resources from the same session
5877 - TCR beta chain convergence defines the tumor infiltrating T cell repertoire of melanoma and non-small cell lung carcinoma.
Presenter: Timothy Looney
Session: Poster display session: Biomarkers, Gynaecological cancers, Haematological malignancies, Immunotherapy of cancer, New diagnostic tools, NSCLC - early stage, locally advanced & metastatic, SCLC, Thoracic malignancies, Translational research
Resources:
Abstract
3212 - PI3K inhibition and modulation of immune and tumor microenvironment markers by copanlisib in patients with non-Hodgkin's lymphoma or advanced solid tumors
Presenter: Ahmad Awada
Session: Poster display session: Biomarkers, Gynaecological cancers, Haematological malignancies, Immunotherapy of cancer, New diagnostic tools, NSCLC - early stage, locally advanced & metastatic, SCLC, Thoracic malignancies, Translational research
Resources:
Abstract
3574 - Pan-squamous genomic profiling stratified by anatomic tumor site and viral association
Presenter: Meagan Montesion
Session: Poster display session: Biomarkers, Gynaecological cancers, Haematological malignancies, Immunotherapy of cancer, New diagnostic tools, NSCLC - early stage, locally advanced & metastatic, SCLC, Thoracic malignancies, Translational research
Resources:
Abstract
4113 - Toward the Standardization of Bioinformatics Methods for the Accurate Assessment of Tumor Mutational Burden (TMB)
Presenter: Han Chang
Session: Poster display session: Biomarkers, Gynaecological cancers, Haematological malignancies, Immunotherapy of cancer, New diagnostic tools, NSCLC - early stage, locally advanced & metastatic, SCLC, Thoracic malignancies, Translational research
Resources:
Abstract
4468 - Prediction of primary resistance to anti-PD1 therapy (APD1) in 2nd line NSCLC
Presenter: Egbert Smit
Session: Poster display session: Biomarkers, Gynaecological cancers, Haematological malignancies, Immunotherapy of cancer, New diagnostic tools, NSCLC - early stage, locally advanced & metastatic, SCLC, Thoracic malignancies, Translational research
Resources:
Abstract
4570 - Immunomodulatory germline variation impacts the development of multiple primary melanoma (MPM).
Presenter: Robert Ferguson
Session: Poster display session: Biomarkers, Gynaecological cancers, Haematological malignancies, Immunotherapy of cancer, New diagnostic tools, NSCLC - early stage, locally advanced & metastatic, SCLC, Thoracic malignancies, Translational research
Resources:
Abstract
1169 - Leukocyte telomere length and recurrence risk after EGFR-TKIs therapy in patients with advanced lung adenocarcinoma
Presenter: Ming Yang
Session: Poster display session: Biomarkers, Gynaecological cancers, Haematological malignancies, Immunotherapy of cancer, New diagnostic tools, NSCLC - early stage, locally advanced & metastatic, SCLC, Thoracic malignancies, Translational research
Resources:
Abstract
1707 - Gene embedding: a novel machine learning approach to identify gene candidates related to immunotherapy responsiveness
Presenter: Chi Tung Choy
Session: Poster display session: Biomarkers, Gynaecological cancers, Haematological malignancies, Immunotherapy of cancer, New diagnostic tools, NSCLC - early stage, locally advanced & metastatic, SCLC, Thoracic malignancies, Translational research
Resources:
Abstract
2123 - Common and rare DPYD variants are predictive for 5FU/capecitabine (5FU) toxicity: The MRC COIN and COIN-B trials
Presenter: Ayman Madi
Session: Poster display session: Biomarkers, Gynaecological cancers, Haematological malignancies, Immunotherapy of cancer, New diagnostic tools, NSCLC - early stage, locally advanced & metastatic, SCLC, Thoracic malignancies, Translational research
Resources:
Abstract
5671 - The landscape of NTRK fusions in Chinese solid tumor patients
Presenter: Qi Ling
Session: Poster display session: Biomarkers, Gynaecological cancers, Haematological malignancies, Immunotherapy of cancer, New diagnostic tools, NSCLC - early stage, locally advanced & metastatic, SCLC, Thoracic malignancies, Translational research
Resources:
Abstract