Table 1.

Clinical characteristics of the study group

Age of patients (years)*	56.7 ± 1.2
Preoperative calcitonin (pg/ml)*	558 ± 62
Postoperative calcitonin (pg/ml)*	167 ± 44
Nodule’s size (mm)*	19.8 ± 1.0
C cell hyperplasia (number of patients/total)	6/134
MEN 2 (number of patients/total)	2/134
Hereditary cancer (number of patients/total)	14/134
Single nodule (number of patients/total)	72/134

Footnote: *Mean values ± Standard Deviation.