Lung-cancer related chest events detected by periodical follow-up CT after stereotactic body radiotherapy for stage I primary lung cancer: retrospective analysis of incidence of lung-cancer related chest events and outcomes of salvage treatment

Purpose Follow-up by chest CT is often performed routinely after stereotactic body radiotherapy (SBRT) for primary lung cancer. We investigated how often periodical chest CT detected lung-cancer related chest events (failure in the chest, new primary lung cancer), and how often chest CT follow-ups l...

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Published in:Japanese journal of radiology 2012-10, Vol.30 (8), p.671-675
Main Authors: Hamamoto, Yasushi, Kataoka, Masaaki, Yamashita, Motohiro, Nogami, Naoyuki, Sugawara, Yoshifumi, Kozuki, Toshiyuki, Sawada, Shigeki, Suehisa, Hiroshi, Shinohara, Syuichi, Nakajima, Naomi, Shinkai, Tetsu
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Language:English
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Summary:Purpose Follow-up by chest CT is often performed routinely after stereotactic body radiotherapy (SBRT) for primary lung cancer. We investigated how often periodical chest CT detected lung-cancer related chest events (failure in the chest, new primary lung cancer), and how often chest CT follow-ups led to curative intent salvage treatment. Materials and methods Between 2006 and 2009, 90 stage I primary lung cancers in 86 patients received SBRT. In principle, chest CT was scheduled every 2–3 months in the first two years, and every 3–4 months thereafter. Results Median time to follow-up by chest CT was 26 months (1–61 months). Twenty-seven lung-cancer related chest events were detected by periodical chest CT after SBRT. The three-year lung-cancer related chest event free rate was 62 %. It was possible to apply curative-intent salvage treatment to 56 % of the lung-cancer related chest events. The two-year overall survival rate was 66 % among the 13 patients who received curative-intent salvage treatment (radiotherapy, 11; surgery, 2). Conclusion Post-SBRT lung-cancer related chest events (as detected by periodical chest CT) were not uncommon (approximately 40 % at 3 years from SBRT), and it was possible to treat more than half of these lesions with curative-intent salvage treatment.
ISSN:1867-1071
1867-108X
DOI:10.1007/s11604-012-0107-2