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Metabolic and metastatic characteristics of ALK-rearranged lung adenocarcinoma on FDG PET/CT

Cited 44 time in Web of Science Cited 48 time in Scopus
Authors
Choi, Hongyoon; Paeng, Jin Chul; Kim, Dong-Wan; Lee, June Koo; Park, Chang Min; Kang, Keon Wook; Chung, June-Key; Lee, Dong Soo
Issue Date
2013-03
Citation
Lung Cancer, Vol.79 No.3, pp.242-247
Keywords
FDG PET/CTMetabolismALK rearrangementEGFR mutationLung cancerSUV
Abstract
Introduction: ALK rearrangement in lung cancer has been identified as a novel molecular target in lung adenocarcinoma. In this study, we evaluated metabolic and metastatic features of lung adenocarcinoma by using FDG PET/CT, with regard to specific genotypes of ALK and EGFR mutation. Methods: Patients with lung adenocarcinoma initially diagnosed and examined with FDG PET/CT and molecular genotyping with biopsy specimen, from September 2009 to September 2011, were selected retrospectively. ALK fluorescence in situ hybridization and EGFR mutations were tested. Maximum standardized uptake value (SUVmax) and metastatic characteristics on FDG PET/CT were analyzed with regard to ALK and EGFR status. Results: Of the 331 lung adenocarcinoma patients, 18 were ALK positive (ALK(+)), 156 were EGFR mutation positive (EGFR(+)), and 157 were wild type (WT) for both ALK and EGFR mutation. The ALK(+) tumor showed significantly higher SUVmax and more common metastasis to lymph nodes and distant organs than those of other genotypes in overall patients (P < 0.01). In a subgroup analysis of advanced stage (stage IIIb and IV), ALK(+) lung cancer showed significantly higher SUVmax (P < 0.05) than EGFR(+) tumors. In another subgroup analysis of size matched groups, ALK(+) tumors showed significant difference in SUVmax, lymph node and distant metastasis (P < 0.01), particularly in the moderate-sized tumors (1.5-3 cm). Conclusion: ALK-rearranged lung adenocarcinoma represents higher glucose metabolism and more rapid metastasis to lymph nodes or distant sites compared with those with EGFR mutation and wild type, which suggests more aggressive features of ALK rearrangement. (c) 2012 Elsevier Ireland Ltd. All rights reserved.
ISSN
0169-5002
URI
http://hdl.handle.net/10371/165474
DOI
https://doi.org/10.1016/j.lungcan.2012.11.021
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College of Medicine/School of Medicine (의과대학/대학원)Cancer Research Institute (암연구소)Journal Papers (저널논문_암연구소)
College of Medicine/School of Medicine (의과대학/대학원)Internal Medicine (내과학전공)Journal Papers (저널논문_내과학전공)
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