Discordance of epidermal growth factor receptor mutation between primary lung tumor and paired distant metastases in non-small cell lung cancer: A systematic review and meta-analysis

被引:13
|
作者
Lee, Chia Ching [1 ]
Soon, Yu Yang [1 ]
Tan, Char Loo [2 ]
Koh, Wee Yao [1 ]
Leong, Cheng Nang [1 ]
Tey, Jeremy Chee Seong [1 ]
Tham, Ivan Weng Keong [1 ]
机构
[1] Natl Univ Singapore Hosp, Natl Univ Canc Inst Singapore, Dept Radiat Oncol, Singapore, Singapore
[2] Natl Univ Singapore Hosp, Dept Pathol, Singapore, Singapore
来源
PLOS ONE | 2019年 / 14卷 / 06期
关键词
TYROSINE KINASE INHIBITORS; PARALLEL EVOLUTION; BRAIN METASTASES; BONE METASTASES; EGFR MUTATIONS; GENE; CARCINOMA; HETEROGENEITY; MECHANISMS; EXPRESSION;
D O I
10.1371/journal.pone.0218414
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Purpose To evaluate the rate of discordance of epidermal growth factor receptor (EGFR) mutation between primary lung tumor and paired distant metastases in non-small-cell lung cancer (NSCLC). Methods We performed a meta-analysis of 17 studies (518 cases) assessing discordance rates of EGFR mutation in primary tumors and paired distant metastases. We performed subgroup analyses based on EGFR mutation status in primary tumor (mutant or wildtype), site of distant metastasis (bone, central nervous system (CNS) or lung/pleural), methods of testing (direct sequencing or allele-specific testing) and timing of metastasis (synchronous or metachronous). Results The overall discordance rate in EGFR mutation was low at 10.36% (95% CI = 4.23% to 18.79%) and varied widely between studies (I-2 = 83.18%). The EGFR discordance rate was statistically significantly higher in bone metastases (45.49%, 95% CI = 14.13 to 79.02) than CNS (17.26%, 95% CI = 7.64 to 29.74; P = 0.002) and lung/pleural metastases (8.17%, 95% CI = 3.35 to 14.85; P < 0.001). Subgroup analyses did not demonstrate any significant effect modification on the discordance rates by the EGFR mutation status in primary lung tumor, methods of testing and timing of metastasis. Conclusion The overall discordance rate in EGFR mutation between primary lung tumor and paired distant metastases in NSCLC is low, although higher discordance rates were observed in bone metastases compared with CNS and lung/pleural metastases. Future studies assessing the impact of EGFR mutation discordance on treatment outcomes are required.
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页数:15
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