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Publication-only abstracts (abstract number preceded by an "e"), published in conjunction with the 2019 ASCO Annual Meeting but not presented at the Meeting, can be found online only.

The clinical prognostic factors in advanced lung adenocarcinoma patients with different EGFR mutation subtype.

Sub-category:
Metastatic Non-Small Cell Lung Cancer

Category:
Lung Cancer—Non-Small Cell Metastatic

Meeting:
2019 ASCO Annual Meeting

Abstract No:
e20680

Citation:
J Clin Oncol 37, 2019 (suppl; abstr e20680)

Author(s): Yudong Wang, Jianzhu Yan, Jing Zuo, Zhisong Fan, Long Wang, Xiaoli Xu, Fengling Liu, Suju Wei, Da Jiang; The 4th Hospital of Hebei Medical University, Shijiazhuang, China; Department of Medical Oncology, the Fourth Hospital of Hebei Medical University, Shijiazhuang, China; Fourth Hospital of Hebei Medical University, Shijiazhuang, China; Department of Medical Oncology, the Fourth Hospital of Hebei Medical University, Shi Jiazhuang, China; Department of Medical Oncology, the Fourth Hospital of Hebei Medical University, Shijia Zhuang, China; Department of Medical Oncology, the Fourth Hospital of Hebei Medical University, Shi Jia Zhuang, China

Abstract Disclosures

Abstract:

Background: The prognostic factors of advanced NSCLC patients with EGFR mutation subtypes remains controversial. This study aimed to investgate the association of clinical prognostic factors with EGFR-TKI efficacy in advanced lung adenocacinoma patients with different EGFR mutation subtypes. Methods: The clinical characteristics, treatment and survival data of advanced lung adenocarcinoma patients with EGFR sensitive mutations who were treated with Icotinib (Betta Pharmaceuticals, China) from January 2011 to December 2017 in our medical center were reviewed. The prognositic factors of patients between with EGFR exon 19 deletion (19-Del) and exon 21 Leu858Arg mutation (L858R) were retrospectively analyzed by using the Kaplan-Meier method, the chi-square test, and multivariate Cox hazards model. Results: A total of 187 patients were enrolled in the study, including 104 patients with EGFR19-Del and 83 patients with EGFR21-L858R. The results showed that no significant difference in mPFS between the two groups (19-Del vs. L858R: 15.0 months, 95% CI 17.2-32.8months vs. 13.0 months 95% CI 11.7-14.3 months, p = 0.347), while the mOS of patients with 19-Del (35months, 95% CI 28.6-41.4 months) was significantly better than that of patients with EGFR21-L858R (25 months, 95%CI 17.2-32.8 months, p = 0.020). For PFS, liver metastasis was an independent prognostic factor in EGFR19-DEL patients (HR 5.009, 95%CI 1.296-19.354, p = 0.019), while gender (HR 5.881, 95%CI 2.105-16.431, p = 0.001), smoking status (HR 6.972, 95%CI 2.851-17.049, p = 0.001), lymph node metastasis (HR 2.676, 95%CI 1.002-7.148, p = 0.050) were independent prognostic factors in patients with L858R. As for OS, age (HR 1.080, 95%CI 1.017-1.147, p = 0.012), brain metastases (HR 23.166, 95%CI 3.946-136.009, p = 0.001), liver metastases (HR 14.088, 95%CI 1.782-111.385, p = 0.012), renal or adrenal metastasis (HR 10.558, 95%CI 1.480-75.326, p = 0.019), TKI initial efficacy (HR 6.638, 95%CI 2.743-16.067, p = 0.001) were independent prognostic factors in patients with 19-del, however, the initial efficacy of TKI (HR 6.089, 95% CI 2.669-13.893, p = 0.001) was an independent prognostic factor in patients with L858R. Conclusions: The mOS of patients with EGFR 19-Del treated with Icotinib was significantly better than that of patients with L858R, while the mPFS of both were similar. Moreover, there are significant differences in prognostic factors of advanced lung adenocarcinoma patients between with 19-Del and L858R subtypes, which may be helpful for the clinical treatment strategy of EGFR-TKI.

 
Other Abstracts in this Sub-Category:

 

1. Association of STK11/LKB1 genomic alterations with lack of benefit from the addition of pembrolizumab to platinum doublet chemotherapy in non-squamous non-small cell lung cancer.

Meeting: 2019 ASCO Annual Meeting Abstract No: 102 First Author: Ferdinandos Skoulidis
Category: Lung Cancer—Non-Small Cell Metastatic - Metastatic Non-Small Cell Lung Cancer

 

2. Real-world outcomes of patients with advanced non-small cell lung cancer (aNSCLC) and autoimmune disease (AD) receiving immune checkpoint inhibitors (ICIs).

Meeting: 2019 ASCO Annual Meeting Abstract No: 110 First Author: Sean Khozin
Category: Lung Cancer—Non-Small Cell Metastatic - Metastatic Non-Small Cell Lung Cancer

 

3. RELAY: A multinational, double-blind, randomized Phase 3 study of erlotinib (ERL) in combination with ramucirumab (RAM) or placebo (PL) in previously untreated patients with epidermal growth factor receptor mutation-positive (EGFRm) metastatic non-small cell lung cancer (NSCLC).

Meeting: 2019 ASCO Annual Meeting Abstract No: 9000 First Author: Kazuhiko Nakagawa
Category: Lung Cancer—Non-Small Cell Metastatic - Metastatic Non-Small Cell Lung Cancer

 

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