“…all analyses were performed using r (version 3. 39 retrospective 500-296 T1a, 40 T1b, 4 T2,19 T3, 0 T4, 141 others robotic; laparoscopic Khalifeh a, 2013 40 retrospective 943 -763 T1a, 107 T1b, 16 T2,45 T3, 0 T4, 12 others robotic Jeong SJ, 2010 44 retrospective 98 -91 T1a, 4 T1b, 0 T2,2 T3, 0 T4, 1 other open; laparoscopic Bigot P, 2014 45 retrospective 126-0 T1a, 0 T1b, 107 T2, 19 T3, 0 T4 open; robotic; laparoscopic Mullins JK, 2012 47 retrospective 207-168 T1a, 25 T1b,1 T2, 13 T3, 0 T4, robotic; laparoscopic Zargar K, 2015 48 retrospective 505-393 T1a, 79 T1b,16 T2, 17 T3, 0 T4, open; laparoscopic ceccarelli g, 2013 51 retrospective 28-24 T1a, 3 T1b, 0 T2, 1 T3, 0 T4, robotic Komninos c, 2014 52 retrospective 188-128 T1a, 49 T1b,7 T2, 4 T3, 0 T4 robotic Koo Kc, 2014 53 retrospective 82-60 T1,1 T2,21 T3, 0 T4 / Ha YS, 2013 54 retrospective 423 -304 T1a, 119 T1b, 0 T2, 0 T3, 0 T4 open; robotic; laparoscopic Halachmi S, 2011 55 retrospective / open Kreshover Je, 2013 56 retrospective 360 -302 T1a, 58 T1b, 0 T2,0 T3, 0 T4, laparoscopic liu Z,2012 57 retrospective 168 -28 T1a, 140 T1b, 0 T2,0 T3, 0 T4, open; laparoscopic Di Pierro g, 2013 58 retrospective 11-11 T1a, 0 T1b, 0 T2,0 T3, 0 T4, laparoscopic Dulabon lM, 2010 59 retrospective 333-271 T1a, 42 T1b,4 T2,16 T3, 0 T4, 4 others robotic george aK, 2014 60 retrospective / laparoscopic Breau rH, 2010 61 retrospective 69-0 T1a, 0 T1b, 32 T2,37 T3, 0 T4, open lane, Br 2013 62 retrospective 1203-894 T1a, 227 T1b, 82 T2or higher open; laparoscopic lane Br 2010 63 retrospective 1260-935 T1a, 235 T1b, 90 T2or higher open; laparoscopic roos fc, 2011 64 retrospective / open of interest separately for the different surgical techniques performed. in conclusion, 33 studies were selected for qualitative and quantitative analysis.…”