Surname of first author Year Country Study design No. of patients Age Age Histology Histology Histology
Median Range SSC ACa Other
Yilmaz 2018 Turkey Retrospective 44 54.6 28–78 NS NS NS
Yildirim 2018 Turkey Retrospective 63 58 21–86 NS NS NS
Cima 2017 Switzerland Retrospective 92 57 30-89 71 14 7
Guler 2018 Turkey Retrospective 129 57 22–83 119 10 -
Lucia 2018 France Retrospective 69 58 29–90 54 9 6
Hong 2016 Korea Retrospective 56 57 32–81 49 7 -
Herrera 2016 Switzerland Retrospective 38 52.5 26–83 33 5 -
Chong 2015 Korea Retrospective 56 51.5 NS 50 6 -
Onal 2015 Korea Retrospective 93 58 30–89 87 6 -
Im 2014 Korea Retrospective 145 55 22-88 131 10 4
Onal 2013 Turkey Retrospective 149 58 21-86 138 11 -
Chong 2017 Korea Retrospective 93 53.1 NS 85 5 -
Lee 2020 Korea Retrospective 270 NS NS 243 NS NS
Vercellino 2012 France Retrospective 16 57 32-69 15 1 NS