Table 1: The clinicopathological features of the study subjects.

Clinicopathological featuresNumber

Patients with PTC ( )
Age
 <45 years32
 ≥45 years20
Sex
 Male15
 Female37
Tumor size
2 cm31
 ≥2 cm21
TNM staging
 I38
 II4
 III3
 IV7
Heteromorphic nucleus6
Multicentricity20
Tumor location
 Unilateral45
 Bilateral7
Cervical LN metastasis29
BRAF gene mutation19
AMES
 Low risk45
 High risk7
Thyroglobulin level
 Low3
 Normal35
 High14
Patients with BTN ( )
Age
 <45 years34
 ≥45 years18
Sex
 Male12
 Female40
Nodule
 Solitary nodule28
 Multinodule24

TNM: tumor node metastasis; LN: lymph nodes; AMES: age, metastasis to distant sites, extrathyroidal invasion, and tumor size scoring system.