Table 1.

Clinicopathological and pathological characteristics of 65 patients with sporadic medullary thyroid carcinoma.

Characteristic
Sex, female/male	27/38
Age at diagnosis, years	49.7 ± 12.6
Tumor size, cm	2.0 ± 1.3
Multifocal tumors	17 (26.2)
Thyroid capsule invasion	21 (32.3)
Vascular invasion	22 (33.8)
Lymph node metastases	34 (52.3)
Infiltration of surrounding soft tissues	16 (24.6)
CEA level, ng/mL
<30	35 (53.8)
≥30	30 (46.2)
Pathological TNM stage
I	19 (29.2)
II	8 (12.3)
III	7 (10.8)
IV	31 (47.7)

Data are presented as n, n (%), or mean ± standard deviation. CEA, carcinoembryonic antigen; TNM: tumor-node-metastasis