[Risk factors of central neck lymph node metastasis in cN0 papillary thyroid carcinoma]

Objective:To investigate the risk factors of central neck lymph node metastasis (CNLNM) in cN0 papillary thyroid carcinoma. Method:Retrospective analysis of 114 patients with papillary thyroid carcinoma in stage of cN0 who underwent primary treatment. Collected the clinical and pathological data, used the univariate and multivariate analysis to investigate the risk factors of central neck lymph node metastasis and high volume central neck lymph node metastasis.Result:In the univariate analysis, age (48.2% in<45 years vs 27.6% in≥45 years), multifocal (51% with vs 27.7% without), nodular goiter (58.8% with vs 28.7% without), showed significant difference in prevalence of CNLNM. Age (14.3% in<45 years vs 1.7% in≥45 years), tumor size (19.2% >1 cm vs 4.5%≤1 cm) showed significant difference in prevalence of high volume CNLNM. Inmultivariate analysis, age (RR= 0.304), multifocal (RR= 3.637) and nodular goiter (RR= 4.132) showed the independent risk factor of CNLNM.Conclusion:For cN0 patients with thyroid papillary carcinoma, if the age is younger than 45 years old, the tumor is multifocal, or associatedwith nodular goiter, the surgery should be more aggressive in the prophylactic central neck dissection.