Table 1: Positive rates of cervical lymph node metastases and overall five-year survival rates after three-field lymph node dissection.

Positive rates of cervical lymph node metastases according to tumor location Overall 5-year survival rates according to pN status
AuthorsUpper (%)Middle (%)Lower (%)Total (%)pN0 (%)pN1 (%)pN1 in cervical field (%)Total (%)

Isono et al. [3]42381933NANANA34
Altorki et al. [6]1359333688332551
Lerut et al. [7]44.426.22323.680.224.512.841.9
Shiozaki et al. [8]23.534.510.527.5NANANA48.5
Shimada et al. [4]4830182668373252
Tachimori et al. [9]21.225.55.6178530~5030 NA