Table 1.
Basic information of the studies
| Authors | Year | Country | Research design | Case number | Surgical approach |
|---|---|---|---|---|---|
| Lim [15] | 2009 | Korea | Retrospective clinical study | 86 | TT+PCLND |
| S. vergez [20] | 2010 | France | Retrospective clinical study | 82 | TT or NTT+PCLND |
| Zhao [7] | 2012 | China | Retrospective clinical study | 212 | TT+PCLND |
| Kim [16] | 2013 | Korea | Retrospective clinical study | 483 | TT or NTT+PCLND |
| So [17] | 2010 | Korea | Retrospective clinical study | 551 | TT+PCLND |
| Wada [12] | 2003 | Japan | Retrospective clinical study | 259 | TT or NTT+PCLND |
| Lee [13] | 2008 | Korea | Retrospective clinical study | 52 | TT or NTT+PCLND |
| Shao [18] | 2009 | China | Retrospective clinical study | 117 | TT or NTT+PCLND |
| Wang [19] | 2008 | China | Retrospective clinical study | 86 | TT or NTT+PCLND |
TT: total thyroidectomy, NTT: near-total thyroidectomy, PCLND: prophylactic central lymph node dissection.