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Journal Thoracic Oncology

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Abstracts <strong>Journal</strong> of <strong>Thoracic</strong> <strong>Oncology</strong> • Volume 12 Issue S1 January 2017<br />

the epidemiological characteristics and the incidence of mutations in patients<br />

diagnosed with advanced NSCLC in our institution. Analyze toxicities and<br />

adherence to treatment. Evaluate treatments performed and the problem<br />

of the analysis of the biopsy. We analyzed patients from June 2012 to date.<br />

Results: We found 61 /326 ( 18.7%) patients with detectable EGFR mutation,<br />

47 women (77 %) and 39% smokers, 47 patients had advanced or unresectable<br />

disease. The most common sites of metastases were bone and lymph nodes.<br />

27 of the 61 patients had mutation of exon 19, 27 patients with mutation of<br />

exon 21, others in 18 and 20. Five of them with detectable T790M mutation<br />

confirmed by repeat biopsy after progressing to ITK. The most common<br />

side effects were diarrhea and rash, 12 patients had toxicities which had to<br />

reduce dose or discontinue treatment. Conclusion: The most common side<br />

effects were diarrhea and rash, 12 patients had toxicities which had to reduce<br />

dose or discontinue treatment. We had a low incidence of invalid or not<br />

evaluable biopsies. although not all patients with detectable mutation were<br />

treated with ITK, who received such treatment had good adhesion and a low<br />

percentage of patients had to discontinue treatment<br />

Keywords: EGFR, lung cancer, NSCLC<br />

POSTER SESSION 3 – P3.02B: ADVANCED NSCLC & CHEMOTHERAPY/TARGETED THERAPY/<br />

IMMUNOTHERAPY<br />

EGFR CLINICAL –<br />

WEDNESDAY, DECEMBER 7, 2016<br />

P3.02B-071 FIRST-LINE GEFITINIB FOR EGFR-MUTATED LUNG<br />

ADENOCARCINOMA PATIENTS WITH BONE METASTASES - A SINGLE<br />

INSTITUTION EXPERIENCE<br />

Davorin Radosavljevic, Jelena Spasic, Nemanja Stanic, Marija Ristic, Milos<br />

Ratknic<br />

Clinic for Medical <strong>Oncology</strong>, Institute for <strong>Oncology</strong> and Radiology of Serbia,<br />

Belgrade/Serbia<br />

Background: Bone involvement has been considered as an adverse predictive<br />

factor in the systemic treatment of majority of malignant tumors. New<br />

horizon, opened with targeted agents, especially in lung cancer, faced us with<br />

encouraging results of treatment in advanced cancer patient population.<br />

Gefitinib, first generation tyrosine kinase inhibitor (TKI), has been a standard<br />

first-line treatment for EGFR mutated lung adenocarcinoma patients<br />

in Serbia since 2011. Methods: Fifty-one consecutive patients (pts) with<br />

advanced lung adenocarcinoma and EGFR mutation were treated with 1 st line<br />

gefitinib at IORS since 2011. Fourteen of them were with bone metastases<br />

(BM). We compared treatment outcome of BM group (n=14) with group of pts<br />

without BM (n=37) in terms of progression-free survival (PFS) and overall<br />

survival (OS) Results: In the group of 14 pts with BM F/M ratio was 9/6, median<br />

age 57 years (26-64), 5/14 were never smokers. Performance status (PS) 1<br />

had 7 pts, PS2 4 pts and PS3 3 pts. Eight pts had deletion of exon 19, five pts<br />

mutation in exon 21, one patient had double mutation G719X/S7681. Bone<br />

only metastases had 4/14 pts, additional metastatic sites in 10 pts were as<br />

follows: lung in 3 pts, liver in 2 pts, pleura in 3 pts and pericardium in 2 pts.<br />

The best therapy response in pts with BM was as follows: partial response<br />

in 5 pts, stable disease in 7 pts, progressive disease in 2 pts. Median PFS in<br />

BM group was 10.91 months (5.87-15.94, CI 95%) and 5.78 months (3.41-8.15,<br />

CI 95%) in the group of 37 pts without BM (log rank p=0.47). Median OS in<br />

BM group was 21.95 months (17.68-26.71, CI 95%), 18.17 months (5.95-30.30,<br />

CI95%), in pts without BM (log rank p=0.26). Toxicity of gefitinib was as<br />

expected and mild: skin rash grade 1 and diarrhea grade 1 in 9 pts, elevated<br />

transaminases grade 1 in one patient and grade 2 in one patient. Conclusion:<br />

In this small set of TKI treated advanced lung adenocarcinoma patients in 1 st<br />

line, somewhat counterintuitive results were achieved: better PFS and OS<br />

results for BM group may be attributable to mutations more susceptible to<br />

TKI activity (mostly exon 19), absence of brain metastases in this group, good<br />

PS in one half of pts. But, it seems that stigma about poor results of systemic<br />

treatment in pts with BM should be set aside, at least in case of advanced<br />

adenocarcinoma of the lung and TKI.<br />

Keywords: adenocarcinoma of the lung, bone metastases, EGFR mutation,<br />

gefitinib<br />

POSTER SESSION 3 – P3.02B: ADVANCED NSCLC & CHEMOTHERAPY/TARGETED THERAPY/<br />

IMMUNOTHERAPY<br />

EGFR CLINICAL –<br />

WEDNESDAY, DECEMBER 7, 2016<br />

P3.02B-072 A MULTICENTER PHASE II STUDY OF GEFITINIB<br />

IN SQUAMOUS NSCLC PATIENTS WHO FAILED FIRST-LINE<br />

CHEMOTHERAPY<br />

Hae Su Kim 1 , Tae Kyu Lim 1 , Seung-Hyun Nam 1 , Yoon Hee Choi 2 , Young-Woong<br />

Won 3 , Hoon-Gu Kim 4 , Jong-Mu Sun 5 , Jung Hye Kwon 6 , Ki-Hyang Kim 7 , Joung<br />

Soon Jang 8 , Jin Hyoung Kang 9 , Bong-Seog Kim 1<br />

1 Division of Hematology-<strong>Oncology</strong>, Department of Medicine, Veterans Health<br />

Service Medical Center, Seoul/Korea, Republic of, 2 Division of Hematology-<br />

<strong>Oncology</strong>, Department of Medicine, Dongnam Institute of Radiological and Medical<br />

Sciences, Busan/Korea, Republic of, 3 Hanyang University Guri Hospital, Guri/Korea,<br />

Republic of, 4 Gyeongsang National University, Jinju/Korea, Republic of, 5 Samsung<br />

Medical Center, Sungkyunkwan University School of Medicine, Seoul/Korea,<br />

Republic of, 6 Hallym University Medical Center, Seoul/Korea, Republic of, 7 Busan<br />

Paik Hospital, INJE University, Busan/Korea, Republic of, 8 Department of Internal<br />

Medicine, Chung-Ang University College of Medicine, Seoul/Korea, Republic of,<br />

9 Seoul St. Mary’s Hospital, the Catholic University of Korea College of Medicine,<br />

Seoul/Korea, Republic of<br />

Background: The role of EGFR tyrosine-kinase inhibitors in the second-line<br />

for patients with squamous non-small-cell lung cancer (NSCLC) remains<br />

unclear. We conducted a prospective phase II study to assess use of gefitinib<br />

in patients with squamous NSCLC as second-line chemotherapy, and<br />

investigated the predictive and prognostic value of a proteomic signature<br />

using VeriStrat test. Methods: Between December 2011 and October 2015, 56<br />

patients with histologically confirmed, second-line, Stage IIIB or IV NSCLC<br />

were enrolled in 9 centres in Republic of Korea. Patients were treated with<br />

gefitinib (250 mg per day orally). The proteomic test classification was<br />

masked for patients and investigators. The primary end point was disease<br />

control rate (DCR) at 8-weeks, and the secondary end points included<br />

toxicity, progression-free survival (PFS), overall survival (OS), and correlation<br />

between the serum proteomic test classification and treatment. This study is<br />

registered with ClinicalTrials.gov, number NCT01485809. Results: The median<br />

age was 69 years (range, 41-83) and 55 (98%) patients were male, and 49 (88%)<br />

had an ECOG PS of 1. Fifty five (98%) of patients had received platinum-based<br />

chemotherapy. The DCR at 8 weeks was 50.0% (95% confidence interval<br />

[CI] 34.8-63.4). With a median follow-up of 5.5 months, the median PFS<br />

and OS were 2.8 (95% CI 1.3-4.3) and 6.4 (5.4-7.4) months, respectively. The<br />

most common adverse event were rash (16 [29%]) and diarrhea (14 [25%]).<br />

Pretreatment plasma was available for 50 samples, and VeriStrat testing was<br />

successful in 45 samples (90%) with 71% classified as Good. The median PFS<br />

were 3.2 (95% CI 1.9-4.7) and 2.4 (1.5-3.3) months for VeriStrat Good vs. Poor<br />

patients, respectively (p=0.639). The median OS of VeriStrat Good was longer<br />

than those of VeriStrat Poor (11.4 [5.7-17.0] vs 4.8 [2.5-7.0] months), which was<br />

not statistically significant (p=0.052). Conclusion: These data suggest that<br />

gefitinib is modest activity as second-line chemotherapy in patients with<br />

squamous NSCLC. Serum proteomic test using VeriStrat is not prognostic for<br />

both OS and PFS among squamous NSCLC patients treated with gefitinib.<br />

Keywords: Prospective study, NSCLC, gefitinib<br />

POSTER SESSION 3 – P3.02B: ADVANCED NSCLC & CHEMOTHERAPY/TARGETED THERAPY/<br />

IMMUNOTHERAPY<br />

EGFR CLINICAL –<br />

WEDNESDAY, DECEMBER 7, 2016<br />

P3.02B-073 A PHASE II, LIQUID BIOPSY STUDY USING DIGITAL<br />

PCR IN EGFR MUTATED, LUNG CANCER PATIENTS TREATED WITH<br />

AFATINIB (WJOG 8114LTR)<br />

Hiroaki Akamatsu 1 , Yasuhiro Koh 1 , Satoshi Morita 2 , Daichi Fujimoto 3 , Isamu<br />

Okamoto 4 , Akihiro Bessho 5 , Koichi Azuma 6 , Kazuhiko Nakagawa 7 , Nobuyuki<br />

Yamamoto 1<br />

1 Respiratory Medicine and Clinical <strong>Oncology</strong>, Wakayama Medical University,<br />

Wakayama/Japan, 2 Kyoto University, Kyoto/Japan, 3 Department of Respiratory<br />

Medicine, Kobe City Medical Center General Hospital, Kobe-City/Japan, 4 Research<br />

Institute for Diseases of the Chest, Graduate School of Medical Sciences, Kyushu<br />

University, Fukuoka/Japan, 5 Japanese Red Cross Okayama Hospital, Okayama/<br />

Japan, 6 Division of Respirology, Neurology, and Rheumatology, Department of<br />

Internal Medicine, Kurume University School of Medicine, Kurume/Japan, 7 Medical<br />

<strong>Oncology</strong>, Kindai University Faculty of Medicine, Osaka-Sayama/Japan<br />

Background: Liquid biopsy is an ideal strategy to monitor mutation status<br />

of cancer repeatedly and less invasively. In chronic myeloid leukemia, early<br />

remission of mutated cells was reported as a surrogate of longer efficacy.<br />

In epidermal growth factor (EGFR) mutated non-small cell lung cancer<br />

(NSCLC), to detect resistant mutation (exon20 T790M) during treatment<br />

is clinically important because newer tyrosine kinase inhibitors (TKIs)<br />

have been developed. Although some reports have mentioned the utility<br />

of liquid biopsy in EGFR mutated NSCLC, most were single-institutional,<br />

retrospective studies. Methods: West Japan <strong>Oncology</strong> Group (WJOG) 8114LTR<br />

is a multi-institutional, prospective liquid biopsy study in advanced NSCLC.<br />

Chemotherapy naïve, advanced NSCLC patients with EGFR-sensitizing<br />

mutation will receive afatinib monotherapy (40 mg/body) until progressive<br />

disease (PD) or unacceptable toxicity. Plasma DNA will be obtained from<br />

patients at baseline, 2, 4, 8, 12, 24, 48 weeks, and at PD. Three types of<br />

common EGFR mutations (exon 19 deletion, exon 20 T790M and exon 21<br />

L858R) will be analyzed using plasma DNA with multiplexed, pico-droplet<br />

digital PCR assay (RainDrop® system, RainDance Technologies, Billerica, MA).<br />

Copyright © 2016 by the International Association for the Study of Lung Cancer<br />

S647

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