Start Your Search
O18 - Cancer Control and Epidemiology II (ID 133)
- Event: WCLC 2013
- Type: Oral Abstract Session
- Track: Prevention & Epidemiology
- Presentations: 1
O18.03 - The BioCAST / IFCT-1002 study: a comprehensive overview of demographic, risk exposure and somatic mutations of non-small cell lung cancer occurring among French never smokers (ID 3293)
10:30 - 12:00 | Author(s): H. Doubre
Lung cancer occurring in never-smoker (LCINS) is a particular entity. Although the definition is strict (less than 100 cigarette in lifetime) never-smokers are frequently misclassified and no study gives a comprehensive analysis of this group, particularly in a European setting.
All consecutive never-smoker patients diagnosed with a non-small cell lung cancer in one of the 75 participating centers throughout France, between November 2011 and January 2013, were included in this prospective survey. All patients underwent a detailed questionnaire supported by a trained staff during a phone interview. Somatic mutations and cancer clinical and histological data were also recorded from medical charts.
Overall, 384 never-smokers were included and 336 interviews were completed. Most of them were women (n=319, 83.1%). The mean age at diagnosis was 69.8 ± 12.02 and 10.9% were under 55 years-old. None reported alternative smoking (pipe, cigar, water-pipe, gum, or cannabis). Most of them originated from Western and Southern Europe (90.5%). Overall, 219 (65.6%) reported a passive smoking exposure in a domestic setting (n=198; 59.3%), and/or at workplace (n=60; 18.0%). Patients had a personal history of pneumonia in 6.2%, tuberculosis in 8.3%, COPD in 13.0%, and a cancer at another site in 16.6%. Eighty patients reported at least two relatives with lung cancer (24.0%). Definite occupational exposure was observed in 12.0% (n=44) for diesel, 7,1% (n=26) for asbestos, 3.3% (n=12) for poly-aromatic hydrocarbons, 2.4% (n=9) for silica, 0.8% (n=3) for chrome, and 0.5% (n=2) for painting. Exposure to cooking oil was noted in 123 patients (36.8%) with a mean of 49.4 ± 356.7 cooking-dish year. Moreover, 79.7% (n=259) patients were ever exposed to solid fuel fumes for cooking or heating (21.2% during more than 50% of their lifetime). Among women, 91.7% already reached menopause (mean age 49.3 ± 5.6 years-old), 115 (41.7%) were ever-exposed to oral contraceptive (mostly oestrogen-containing drugs), and 25.5% to post-menopause hormone replacement therapy (oral or transdermal). Most of lung cancers were adenocarcinoma (n=327, 85.2%) followed by squamous cell carcinoma (n=29, 7.6%) and large cell carcinoma (n=17; 4.4%). Among adenocarcinoma, 71% were invasive, 4% in-situ, 2% minimally-invasive, 2% variant of invasive, and 20.0% were NOS. Cancer stage was I in 9.2%, II in 5.8%, III in 11.8% and IV in 73.2%. At least one biomarker was tested in 359 patients (93.5%). We found 148 patients with EGFR mutations (43.5% out of the EGFR-tested patients), 20 with KRAS mutations (6.8%), 24 with ALK translocation (12.5%), 10 with BRAF mutation (4.5%), 8 with HER2 mutation (4.0%) and 4 with PIK3CA (2.1%). Overall, 27.0% samples remain wild type, 2.1% with multiple mutations, 71.0% with a single mutation, and 20.6% with missing data.
We provide here the largest cohort of LCINS in a European setting with reliable data on tobacco intoxication, occupational exposure, and hormonal treatments, since collected by a trained staff through phone interview. In this perfectly clinically characterized cohort, molecular analyses showed that 72% of tumors exhibited oncogenic targetable mutations.
Only Active Members that have purchased this event or have registered via an access code will be able to view this content. To view this presentation, please login or select "Add to Cart" and proceed to checkout.