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Pergolini et al. J Cancer Metastasis Treat 2018;4:33 I http://dx.doi.org/10.20517/2394-4722.2017.84 Page 5 of 11

Neo/ adjuvant therapy (%) 0/50 100/100 NR/88 NR/NR NR/NR 18/33 NR/31 46/63 NR NR/NR 19/88 0/0 NR/NR 18/59 16/60 NR/NR 0/40 0/16 28/41 NR/NR 0/42 0/82

Neo/ adjuvant therapy (n) 0/6 20/20 0/37 NR/NR NR/NR 45/84 0/14 11/15 NR/NR NR/NR 5/13 0/0 NR/NR 3/10 4/14 NR/NR 0/8 0/6 18/26 NR/NR 0/22 0/14

Hepatectomy (minor/major) (%) 67/33 30/70 71/7 53/20 81/19 29/71 83/16 42/58 NR/NR NR/NR 100/0 NR/NR 78/22 82/18 NR/NR 91/9 86/14 86/14 78/22 67/33 72/26 NR/NR

Hepatectomy (minor/ major) (n) 8/4 6/14 29/3 7/3 17/4 73/183 35/7 10/14 NR/NR NR/NR 16/0 NR/NR 14/4 14/3 NR/NR 10/1 19/3 32/5 50/14 16/8 38/14 NR/NR

Synchronous/ metachronous (n) 3/9 20/0 30/11 9/6 12/9 106/150 20/22 1/23 0/34 35/0 9/7 16/9 11/7 9/8 NR/NR 8/3 12/10 16/21 34/30 15/9 53/0 9/8

Unilobular/ bilobar (n) 11/1 11/9 NR/NR 12/3 16/5 NR/NR NR/NR NR/NR NR/NR 12/23 11/5 20/5 15/3 NR/NR 21/4 11/0 17/5 30/7 NR/NR 18/6 NR/NR 17/0

Table 1. Basic characteristics of studies regarding hepatectomy for hepatic metastasis from gastric cancer
Solitary/ multiple (n) 11/1 8/12 28/13 8/7 12/9 NR/NR 29/13 17/7 NR/NR 12/23 9/7 18/7 14/4 NR/NR 16/9 11/0 16/6 21/16 37/27 13/11 NR/NR 13/4

M/F (n) 11/1 12/8 34/7 12/3 14/7 207/49 NR 21/3 23/11 29/6 13/3 23/2 16/2 13/4 22/3 10/1 13/11 29/8 49/15 17/7 NR 16/1

Mean age (years) 61 57 NR NR NR NR NR NR 62 NR NR NR NR 66 NR NR NR NR NR NR NR 66

Median age (years) NR NR 60 57 64 64 NR 69 NR NR NR 72 64 NR NR 61 63 64 65 64 NR NR

Sample (n) 12 20 41 15 21 256 42 24 34 35 16 25 18 17 25 11 22 37 64 24 53 17

Median follow-up (months) 13 NR NR NR 20 65 NR NR 29 38 NR NR NR 20 38 19 17 NR 27 9 NR 29

Recruitment period 2003-2010 2007-2012 1995-2005 1995-2009 1998-2007 1990-2010 1985-2005 2000-2012 1996-2012 1995-2010 1992-2007 1995-2009 1989-2004 1991-2005 1998-2009 1988-1996 1985-2001 1990-2005 1993-2011 1988-2002 1997-2011 1980-2007

Year of publication 2013 2013 2008 2012 2012 2014 2007 2014 2017 2012 2010 2012 2008 2009 2013 2005 2003 2007 2012 2008 2015 2010

Area South Korea China South Korea Germany Italy Japan Japan Japan Taiwan China Japan Japan Japan Japan China South Korea Japan Japan Japan Germany Italy Japan

Study Baek et al. [18] Chen et al. [19] Cheon et al. [20] Dittmar et al. [21] Garancini et al. [22] Kinoshita et al. [23] Koga et al. [24] Komeda et al. [25] Li et al. [26] Liu et al. [27] Makino et al. [28] Miki et al. [29] Morise et al. [30] Nomura et al. [31] Qiu et al. [32] Roh et al. [33] Sakamoto et al. [34] Sakamoto et al. [35] Takemura et al. [36] Thelen et al. [37] Tiberio et al. [38] Tsuji