Objective To explore the possible risk factors of contralateral central lymph node metastasis（CLNM） in solitary thyroid papillary micro-carcinoma (PTMC). Methods Clinicopathologic data of 318 patients with confirmed solitary PTMC by final histological who underwent bilateral centeral lymph node dissection (CLND)from April 2012 to May 2015 in our hospital were retrospectively reviewed. Univariate χ2 test and multivariate logistic regression analysis were used to determine the risk factors of contralateral CLNM in solitary PTMC. Results The incidence of ipsilateral CLNM and contralateral CLNM in solitary PTMC patients were 40.57% (129/318), 9.75% (31/318), respectively. Univariate analyses revealed that contralateral CLNM had a correlation with tumor located in lower pole, capsular invasionand underlying ipsilateral CLNM (PPP
