Risk Factors for Cervical Lymph Node Metastasis of Papillary Thyroid Microcarcinoma: A Single-Center Retrospective Study

Table 1

Patient characteristics.

Parameters	Patient number (%)
Gender
Male	189 (24.1%)
Female	596 (75.9%)
Age (year)
Tumor size (mm)
Multifocality
Solitary lesion	559 (71.2%)
Multifocal lesions	226 (28.8%)
Unilateral	86 (11.0%)
Bilateral	140 (17.8%)
Surgery procedure
Lobectomy plus ipsilateral CLND	576 (73.4%)
Total thyroidectomy plus bilateral CLND	174 (22.2%)
Total thyroidectomy plus bilateral CLND and unilateral LLND	35 (4.5%)
Open surgery	624 (79.5%)
Laparoscopic surgery	161 (20.5%)
LNM
LNM	236 (30.1%)
CLNM only	207 (26.4%)
LLNM only	7 (0.9%)
CLNM and LLNM	22 (2.8%)

CLND: central lymph node dissection; LLND: lateral lymph node dissection; LNM: lymph node metastasis; CLNM: central lymph node metastasis; LLNM: lateral lymph node metastasis.