Table 4.

Summary of SBRT for lung metastasis from selected studies

Primary tumor type	Year	No. patients	Local control	Toxicity	References
Mixed	2006	50	3-year local control rate 83%	35% Grade 1 toxicity, 6.1% grade 2 toxicity, 2% grade 3 toxicity	[51]
Mixed (Most NSCLC)	2009	124	3-year local control rate 83%	17.8% Grade 2 toxicity, 1.2% grade 3 toxicity	[48]
Mixed (Most colorectal cancer)	2010	10	1- and 2-year local control rates were 48% and 25%	Not mentioned	[58]
Mixed (Most colorectal cancer)	2011	44	1- and 2-year local control rates in colorectal cancers were 80% and 72%	2 cases of Grade 2 radiation pneumonitis, 1 case of Grade 3 pneumonitis, No Grades 4 radiation pneumonitis	[59]
Mixed (Most NSCLC)	2012	61	2- and 3- year local control rates were 89% and 83.5%	one case of grade 3 radiation pneumonitis	[52]
Mixed (Most colorectal cancer)	2013	32	1-, 2- and 3- year local control rates were 97%, 92% and 85%	no grade 4 toxicity, 3 cases of grade 3 toxicities, 1 case of grade 2 radiation pneumonitis	[60]