Table 6 Comparison of research results from evaluations of retropharyngeal and retro-styloid lymph node metastases in hypopharyngeal carcinoma using different imaging modalities
Author | Year | N | Treatment | Imaging modalities | Prevalence rate of LNM | Risk factors of RPLNM | |
|---|---|---|---|---|---|---|---|
Retropharyngeal | Retro-styloid | ||||||
Our study | 155 | (C)RT | MRI and FDG–PET/CT | 13% | 1% | PW tumor, bilateral or contralateral cervival LNM | |
An et al. [9] | 2021 | 259 | (C)RT | MRI | 17% | NA | PW tumor, PW invasion, N2-3, multiple cervical LNM |
Wang et al. [10] | 2020 | 326 | RT or preoperative RT (T3–4, N+) | MRI | 22% | NA | PW tumor, bilateral LNM, GTVp, GTVn |
Wu et al. [11] | 2013 | 218 | NA | CT or MRI | 17% | NA | Tumor subsite, bilateral LNM, number of LNM, size of cervical LN, level V LNM |
Deng et al. [12] | 2010 | 88 | NA | CT or MRI | 14% | NA | NA |
Chan et al. [13] | 2010 | 122 | CRT | FDG–PET | 17% | NA | PW tumor, Ipsilateral level V LNM |