Table 1.

General characteristics of the eligible studies.

Studies	Years	Groups	Cases	Average ages	MST	OS		MINORS score
Tummarello, D. et al.	1985	Surgery**	15	49 y	6 M	–		11
Saitoh, Y. et al.	1999	Surgery*	24	57.8 y	6.8 M	3-year	12.5%	12
						5-year	8.3%
Mussi, A. et al.	1985	Surgery*	20	50.5 y	–	5-year	33.6%	10
Macchiarini, P. et al.	1991	Surgery*	37	56 y	27 M	5-year	37.0%	10
Louie, A. V. et al.	2009	Surgery**	35	58.5 y	7.8 M	–		14
Granone, P. et al.	2001	Surgery*	30	58.7 y	27.8 M	1-year	80.0%	11
						2-year	41.0%
						3-year	17.0%
Catinella, F. P. et al.	1989	Surgery*	12	–	–	1-year	90.0%	8
						4-year	56.0%
Bai, H. et al.	2011	Surgery**	18	54 y	12.8 M	1-year	83.3%	11
						2-year	48.8%
						3-year	13.9%
Wang, Z. M. et al.	2002	Surgery**	32	55.8 y	12 M	1-year	40.6%	12
Mussi, A. et al.	1996	Surgery*	45	56.9 y	19 M	5-year	16.0%	13
Magilligan, D. J., Jr.	1987	Surgery*	41	–	13 M	1-year	55.0%	10
						2-year	31.0%
						4-year	21.0%
						5-year	21.0%
Magilligan, D. J., Jr.	1976	Surgery*	22	54.8 y	14 M	1-year	45.0%	9
Bonnette, P.	2001	Surgery**	103	54 y	12.4 M	1-year	56.0%	14
						2-year	28.0%
						3-year	13.0%
						4-year	11.0%
Ampil, F. et al.	2007	Surgery**	28	–	5.5 M	1-year	21.0%	16
Hu, C. S. et al. (part)	2006	Surgery**	53	60 y	12 M	–		23
Li, H. et al. (part)	2009	Surgery*	35	–	13 M	–		22
Flannery, T. W. et al.	2008	SRS	42	58 y	18 M	1-year	71.3%	12
						2-year	34.1%
						5-year	21.0%
Flannery, T. W. et al.	2003	SRS	72	58 y	15.7 M	1-year	61.4%	12
						2-year	32.6%
						5-year	10.4%
Hu, C. S. et al. (part)	2006	SRS	31	63 y	7.4 M	–		23
Li, H. et al. (part)	2009	SRS	18	–	14 M	1-year	44.8%	22

Surgery* – subgroup of surgery which had controlled primary tumor; surgery** – subgroup of surgery which had uncontrolled primary tumor.