4Wada N, Duh QY, Sugino K, et al. Lymph node metastasis from 259 papillary thyroid microcarcinomas [ J ]. Annals of Surgery, 2003,237(3) : 399 -407.
5Gimm O, Rath FW, Dralle H. Pattern of lymph node metastases in papillary thyroid carcinoma [ J ]. Bri J Surg, 1998, 85(2) : 252-254.
6Ferlito A, Rinaldo A, Silver CE, et al. Paratrachcal node dissection for well-differentiated cancer of the thyroid: Indications, technique and results [ J ]. Auris Nasus Larynx, 2008, 35(4) :463 -468.
7Reddy RM, Grigsby PW, Moley JF, et al. Lymph node metastases in differentiated thyroid cancer under 2 cm [ J ]. Surgery, 2006,140(6) :1050 - 1055.
