Journal Thoracic Oncology
WCLC2016-Abstract-Book_vF-WEB_revNov17-1
WCLC2016-Abstract-Book_vF-WEB_revNov17-1
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Abstracts <strong>Journal</strong> of <strong>Thoracic</strong> <strong>Oncology</strong> • Volume 12 Issue S1 January 2017<br />
POSTER SESSION 1 - P1.01: EPIDEMIOLOGY, TOBACCO CONTROL AND CESSATION/<br />
PREVENTION<br />
TOBACCO, RADON, AIR POLLUTION, OTHER RISK FACTORS –<br />
MONDAY, DECEMBER 5, 2016<br />
P1.01-004 IS THERE ANY ROLE OF RESIDENTIAL RADON IN NON<br />
SMALL CELL LUNG CANCER (NSCLC) PATIENTS HARBORING<br />
MOLECULAR ALTERATIONS?<br />
Laura Mezquita 1 , Amparo Benito 2 , Maria Eugenia Olmedo 3 , Pablo Reguera 3 ,<br />
Ainhoa Madariaga 3 , Maria Villamayor 3 , Silvia Patricia Cortez 3 , Luis Gorospe 4 ,<br />
Almudena Santon 2 , Sagrario Mayoralas 5 , Raul Hernanz 6 , Alberto Cabanero 7 ,<br />
Alfredo Carrato 3 , Pilar Garrido 3<br />
1 Medical <strong>Oncology</strong> Department, Gustave Roussy, Villejuif/France, 2 Pathology<br />
Department, University Hospital Ramon Y Cajal, Madrid/Spain, 3 Medical <strong>Oncology</strong><br />
Department, University Hospital Ramon Y Cajal, Madrid/Spain, 4 Radiology<br />
Department, University Hospital Ramon Y Cajal, Madrid/Spain, 5 Pulmonary<br />
Department, University Hospital Ramon Y Cajal, Madrid/Spain, 6 Radiation<br />
<strong>Oncology</strong> Department, University Hospital Ramon Y Cajal, Madrid/Spain, 7 <strong>Thoracic</strong><br />
Surgery Department, University Hospital Ramon Y Cajal, Madrid/Spain<br />
Background: Radon gas is the first cause of lung cancer in non-smoking<br />
population. The World Health Organization (WHO) recommends radon<br />
concentration lower than 100 Bq/m3. In recent years, most of the<br />
advances in personalized therapy in NSCLC patients also occurred in nonsmokers.<br />
Furthermore, limited information is available about the clinical<br />
and pathological characteristics in patients exposed to radon gas. We<br />
hypothesized that residential radon could be associated to some specific<br />
pathological and molecular alterations in NSCLC patients. Methods:<br />
Prospective study of a cohort of NSCLC patients harbouring molecular<br />
alterations (EGFR, BRAF mutations (m), ALK and ROS1 rearrangements<br />
(r)) in our centre, between September 2014 and October 2015. A radon<br />
detector alpha-track was given to each patient to measure residential radon<br />
concentration for 3 months; it was analysed using optical microscopy.<br />
We collected demographic information, smoking history, environmental<br />
exposure and clinical characteristics. The pathologic characteristics were<br />
prospectively revised by a lung cancer pathologist, including histology<br />
pattern, grade and inflammatory infiltrate. EGFR and BRAF mutation (m)<br />
were analyzed using quantitative real-time polymerase chain reaction (PCR)<br />
and ALK and ROS1 rearrangement by fluorescence in situ hybridization<br />
(FISH). Data was analyzed using IBM SPSS v.20. Results: 60 detectors were<br />
delivered (10% missing), 48 patients were evaluated (89.6% living in Madrid).<br />
Median age 66.5 (29- 82); 33 (68.8%) females; 33 non-smokers (31.3% passive<br />
smokers and 35.4% childhood exposure) and 3 (6.3%) light smokers. 100%<br />
adenocarcinoma (35.4% mixte, 18.8% acinar, 10.4% solid, 8.3% papillary,<br />
8.3% micropapilllary, 8.4% others and 10.4% unknown); EGFRm 36 patients,<br />
ALKr 10 patients and BRAFm 2 patients. Home characteristics measured:<br />
79.2% flat (89.1% measurement at bedroom); building material: 89.6% bricks.<br />
Median length of stay was 28 years (2-55). Median height of house 2 floors<br />
(0-15). Median of radon concentration: 104 Bq/m3 (42- 915); 60.42% over<br />
WHO recommendation. By molecular alteration: EGFRm median 96 Bq/m3<br />
(42-915), ALKr median 116 (64-852) and BRAFm median 125 (125). A significant<br />
association was observed between non-EGFR mutation and concentration<br />
over the WHO recommendation (p=0.044). In univariant analysis, radon<br />
concentration was associated with non-mucinous histology and low tumoral<br />
grade (p=0.033 and p=0.023, respectively). Conclusion: Our final results have<br />
shown no consistent association between residential radon and molecular<br />
alterations in NSCLC patients, but a trend has been suggested in ALKr and<br />
BRAFm. Large multicenter studies are needed to confirm this hypothesis.<br />
Keywords: Radon, molecular alteration, NSCLC<br />
POSTER SESSION 1 - P1.01: EPIDEMIOLOGY, TOBACCO CONTROL AND CESSATION/<br />
PREVENTION<br />
TOBACCO, RADON, AIR POLLUTION, OTHER RISK FACTORS –<br />
MONDAY, DECEMBER 5, 2016<br />
P1.01-005 FIRST OF ITS KIND STUDY IN INDIA FINDS THAT<br />
GOVERNMENT’S BAN ON GUTKA (HIGHLY POPULAR SMOKELESS<br />
TOBACCO PRODUCT) DID NOT INCREASE SMOKING AT ALL<br />
Gaurav Kumar 1 , Pradeep Kumar 2<br />
1 Community Medicine, Gmers Medical College, Ahmedabad/India, 2 Gmers Medical<br />
College, Ahmedabad/India<br />
Background: India with 11.2%(111.9 million) of world’s smokers has 2 nd largest<br />
population at elevated risk of lung cancer. Almost twice, 206 million(GATS,<br />
2010), are Smokeless tobacco(ST) users in India, highest globally. Supreme<br />
Court of India observed that gutka and pan-masala are food products.<br />
Beginning in 2012, almost all state governments in India banned gutka and<br />
pan-masala containing tobacco. APPREHENSION was raised that ban on ST<br />
products will cause switching to smoking by huge ST user population vastly<br />
increasing risk of lung-cancer in India. This ban provided natural experiment<br />
on which this observational research studied how ban on popular ST products<br />
alters pattern of tobacco-use, especially smoking. Findings are expected to<br />
be strategically significant to inform future policies. Methods: Questionnaire<br />
of Global Adult Tobacco Survey-India(2010), developed by WHO,CDC and<br />
Govt. of India was modified to answer research questions and accommodate<br />
retrospective-cohort study design. Through 2-step randomization process,<br />
500 households were sampled from Delhi. Participants were adults and<br />
interviewed during March-June,2016 comprehensively, including tobaccouse<br />
currently and before gutka-ban. Inbuilt mechanisms in standardized<br />
questionnaire cross-validated self-report and minimised recall bias. Data<br />
was entered into SPSS and statistically analysed. Results: 94% of 500<br />
households visited agreed to participate. 73.4%of pre-ban gutka-users<br />
switched to twin-sachet (pan-masala and chewing-tobacco sold separately by<br />
gutka-manufacturers to circumvent law). Delhi’s order bans all ST products.<br />
But, except premixed gutka, remaining ST products are freely available and<br />
consumed. 21.8%switched to khaini or other ST products. A large fraction<br />
switched from singledose sachets to multidose sachet. Interestingly,<br />
96.2%respondents believed tobacco as very harmful(84.6%) or somewhat<br />
harmful(11.6%). However, only 18.6%gutka users attempted quitting after<br />
ban. 4.8%successfully quitted. In our sample, we DIDNOT find anyone<br />
switching to smoking due to gutka unavailability. On an opposite thought,<br />
one may expect, ban on an ST product(Gutka) will increase awareness<br />
and motivate smokers to quit as spillover effect. But it wasn’t observed<br />
either. Conclusion: In absence of strong quitting promotion campaign, ban<br />
on selective tobacco products has limited role in changing prevalence of<br />
tobacco use. If selective ST products are banned, ST users preferably switch<br />
to other available ST products, BUT NOT to smoking. As majority ST users<br />
switched instead of quitting (after gutka-ban without simultaneous quitting<br />
campaign), we may logically conclude that effective ban on all ST products<br />
may lead ST users to switch to less favourable option of smoking. This is,<br />
however, subject to verification by similar study if there is ever effective ban<br />
on all ST products.<br />
Keywords: Smokeless Tobacco, Gutka ban, smoking, GATS<br />
POSTER SESSION 1 - P1.01: EPIDEMIOLOGY, TOBACCO CONTROL AND CESSATION/<br />
PREVENTION<br />
TOBACCO, RADON, AIR POLLUTION, OTHER RISK FACTORS –<br />
MONDAY, DECEMBER 5, 2016<br />
P1.01-006 INTERSTITIAL LUNG DISEASES ARE AN ANTECEDENT OF<br />
LUNG CANCER<br />
Wonil Choi<br />
Department of Internal Medicine, Keimyung University School of Medicine, Daegu/<br />
Korea, Republic of<br />
Background: Diffuse pulmonary fibrosis may progress into lung cancer<br />
through continuous accumulation and rapid proliferation of fibroblasts and<br />
repeated epithelial injury. Repetitive injury and repair can lead to multiple<br />
genetic alterations affecting cellular growth, differentiation, and survival,<br />
which may elicit malignant potential in the injured area. Diffuse pulmonary<br />
fibrosis appears on chest images through expression of bilateral reticular<br />
or reticulonodular opacities, called interstitial lung diseases. The clinical<br />
significance of these diseases remains poorly understood. To investigate<br />
whether interstitial lung diseases increase lung cancer incidence in a cohort of<br />
patients from a national population. Background: Diffuse pulmonary fibrosis<br />
may progress into lung cancer through continuous accumulation and rapid<br />
proliferation of fibroblasts and repeated epithelial injury. Repetitive injury<br />
and repair can lead to multiple genetic alterations affecting cellular growth,<br />
differentiation, and survival, which may elicit malignant potential in the<br />
injured area. Diffuse pulmonary fibrosis appears on chest images through<br />
expression of bilateral reticular or reticulonodular opacities, called interstitial<br />
lung diseases. The clinical significance of these diseases remains poorly<br />
understood. To investigate whether interstitial lung diseases increase lung<br />
cancer incidence in a cohort of patients from a national population. Results: A<br />
nationwide retrospective cohort study using Korean Health Insurance Review<br />
and Assessment Service data, including 13,666 patients with interstitial lung<br />
disease (6.4% with concomitant idiopathic pulmonary fibrosis) diagnosed<br />
January–December 2009. The end of follow-up was June 31, 2014. Up to four<br />
matching chronic obstructive pulmonary disease controls with and without<br />
concomitant interstitial lung disease (8,012 cases) were selected to compare<br />
the lung cancer high-risk group. Lung cancer was counted after diagnosis of<br />
interstitial lung disease, idiopathic pulmonary fibrosis, or chronic obstructive<br />
pulmonary disease. Conclusion: The incidence of lung cancer was 126.9<br />
cases per 10,000 person-years (2,732 cancers) in the chronic obstructive<br />
pulmonary disease group, 156.6 (809 cancers) in the interstitial lung disease<br />
group, and 370.3 (967 cancers) in the chronic obstructive pulmonary disease<br />
with interstitial lung disease group. Among various interstitial lung disease<br />
definitions, idiopathic pulmonary fibrosis showed the highest lung cancer<br />
incidence. A total of 112 of the 879 patients with idiopathic pulmonary fibrosis<br />
developed lung cancer, an incidence of 381 cases per 10,000 person-years.<br />
Interstitial lung diseases have high potential to develop into lung cancer even<br />
S232 <strong>Journal</strong> of <strong>Thoracic</strong> <strong>Oncology</strong> • Volume 12 Issue S1 January 2017