First author | Year of Publication | City | Patient recruitment period | Total patients | Patients treated with chemotherapy | Patients with nodes | Patients with CNN | Imaging modality | Numbers of undifferentiated + non-keratinising types | AJCC /UICC Edition | Median follow-up time in months (range) | Patient group for analysis |
---|---|---|---|---|---|---|---|---|---|---|---|---|
CNN presence/absence in any nodal group | ||||||||||||
Li [19] | 2013 | Guangzhou | 2003-2007 | 749 | 535 | 565 | 142 | MRI | 744 | 7th | 60.7 (3-104) | N+ group |
Zhang [20] | 2017 | Guangzhou | 2009-2012 | 1302 | 1193 | 1302 | 448 | MRI | 1294 | 7th | 47.8 (1.3-75.3) | N+ group |
Zhou [21] | 2018 | Shanghai | 2010-2011 | 354 | 300 | 320 | 143 | MRI | 353 | 7th | 63 (Not mentioned) | All |
Feng [22] | 2019 | Hangzhou | 2007-2012 | 616 | 601 | 616 | 235 | MRI | 612 | 8th | 62.6 (3.4 -119) | N+ group |
Ai [23] | 2019 | Hong Kong | 2005-2012 | 546 | 382 | 404 | 153 | MRI | 544 | 8th | 82.3 (3.2-150) | N+ group |
Xu [24] | 2021 | Xi’an | 2006-2018 | 792 | 744 | 687 | 501 | MRI | 789 | 7th | 46.2 (1.3-130) | All |
CNN presence/absence in retropharyngeal nodes | ||||||||||||
Tang [25] | 2014 | Guangzhou | 2003-2007 | 749 | 535 | 565 | 64/481 (RPN+) | MRI | 744 | 7th | 81 (3-127) | N+ group |
CNN grades | ||||||||||||
Zhang [26] | 2017 | Guangzhou | 2009-2012 | 1423 | 1310 | 1423 | Grade 1: 213 Grade 2: 257 | MRI | 1415 | 7th | 48.6 (1.3-76) | N+ group |
CNN laterality | ||||||||||||
Xie [27] | 2020 | Guangzhou | 2010-2013 | 733 | 634 | 559 | No/unilateral CNN: 692 Bilateral CNN: 41 | MRI | 728 | 8th | 62 (1.4-83.2) | All |