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OA04 - Epidemiology and Prevention of Lung Cancer (ID 370)
- Event: WCLC 2016
- Type: Oral Session
- Track: Epidemiology/Tobacco Control and Cessation/Prevention
- Presentations: 1
OA04.07 - Clinical Characteristics of Lung Adenocarcinoma in the Young: Results from the Genomics of Young Lung Cancer Study (ID 5578)
11:00 - 12:30 | Author(s): R. Chen
Background: Lung cancer is increasingly recognized as a heterogeneous disease comprised of genomically defined subtypes with distinct targetable genomic alterations. However, it is unknown whether established lung cancer risk factors differ between these genomically distinct subtypes. In this study of the genomics of young lung cancer (GoYLC), we present preliminary results of lifestyle risk factors by specific genomic alteration to better characterize lung cancer in the young.
Methods: Beginning in July of 2014, patients diagnosed with a bronchogenic lung cancer under the age of 40 were recruited to the GoYLC study. Informed consent was obtained in-person and virtually (online), allowing patients to participate globally, regardless of proximity to study sites (https://www.openmednet.org/site/alcmi-goyl). To date, this study has accrued a total of 101 cases, of which 85 are adenocarcinoma (AC). Stage 4 AC is the focus of this analysis.
Results: Among the 63 stage 4 AC cases, the most common genomic alterations were ALK rearrangements (n=28; 44% of stage 4 AC cases) and EGFR mutations (n=17; 27%) while the other genomic alterations (n=18; 29%) include ROS1, BRCA2, HER2, P53, RET and ATM. The prevalence of active smoking and/or exposure to passive smoking was highest among those with ALK (64%), intermediate for those with EGFR (47%) and lowest for those with other genomic alterations (39%). However, the prevalence of only active smoking was lowest among those with ALK (28%), followed by EGFR (35%) and highest for those with other genomic alterations (39%). The majority of patients with ALK rearrangements or EGFR mutations reported no family history of lung cancer (82% and 88%, respectively), compared with 67% among those with other genomic alterations.
Conclusion: These preliminary results suggest that lifestyle characteristics and family history in young lung cancer patients may differ by genomic alteration. Passive smoke exposure was more prevalent among those with ALK rearrangements or EGFR mutations. Those with other genomic alterations, albeit, a heterogeneous group, were least likely to be exposed to passive smoking and more likely to be active smokers. We are continuing to enroll participants and are expanding the epidemiologic characterization to all study patients to evaluate if risk factors also differ by tumor stage and histology (Data to be presented). Importantly, this analysis lays the groundwork for the development of our more comprehensive epidemiology of young lung cancer study that may identify potential lifestyle and environmental risk factors related to specific genomic alterations.
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