[A clinic study of cervical lymph node metastasis in well-differentiated thyroid carcinoma]

To study the distribution of cervical lymph nodes metastasis and explore the surgical treating modality of cervical lymph nodes in the patients with differentiated thyroid carcinoma.

The clinic and pathological data of 104 patients with differentiated thyroid carcinoma who had undergone neck lymph nodes dissection from January 2003 to June 2007 were analyzed retrospectively. There were 29 male and 75 female patients. The age of the patients was 12 to 79 years old with a median of 39 years old. Patients were divided into clinic cervical lymph nodes metastasis (cN+) group and clinic no cervical lymph nodes metastasis (cN0) group according the condition of physical examination and image analysis preoperatively and compared respectively with pathological data postoperatively.

In the cN+ group 91.3% (63/69) patients were pN+ while in the cN0 group 52.1% (25/48) patients were pN+. The distribution of metastasized lymph nodes: level VI 64.1%, level II 31.6%, level III 44.4%, level IV 40.2%, level V 12.0%, level I 3.2%. In the cN+ group 86.7% (54/63) patients with lymph nodes metastasis had multi-levels lymph nodes metastasis while in the cN0 group 64.0% (16/25) patients had single-level lymph nodes metastasis.

Cervical lymph nodes metastasis in the patients with differentiated thyroid carcinoma mainly localize in level II, level III, level IV, level VI, especially level VI. Patients with lymph nodes metastasis had multi-levels lymph nodes metastasis in the cN+ group but single-level in the cN0 group. The surgical treating modality of cervical lymph nodes should also be different in the two group patients.