Table 2.

Comparison of neoplastic behaviors in patients with MTC according to RET mutation status.

RET mutation (n)	Positive (5)	Negative (14)	p
Age at diagnosis (years)	38.4 ± 20.2	54.6 ± 11.8	0.04
Tumor diameter (cm)	1.48 ± 1.1	2.37 ± 1.6	0.61
Vascular invasion	20%	28.6%	0.71
Nodal metastases at surgery	60%	57%	0.66
Distant metastases	20%	14%	0.87
Surgical reintervention because of MTC recurrence	40%	35.7%	0.76

RET: REarranged during Transfection. MTC: medullary thyroid carcinoma.