Table 1.

Stage of advancement (TNM), American Thyroid Association risk stratification system, vascular invasion, extrathyroidal extension, multifocality, and treatment response.

Study group (n = 25)
Stage of advancement (TNM)	T stage
AJCC/TNM staging system (8th edition)	T1a, n  = 5
	T1b, n  = 6
	T2, n  = 10
	T3, n  = 2
	T4, n  = 2
	N stage
	N0, n  = 13
	N1a, n  = 11
	N1b, n  = 1
	M stage
	M0, n  = 25
	M1, n  = 0
Vascular invasion	n = 5
Extrathyroidal extension	n = 1
Multifocality	n = 11
	Low, n  = 0
ATA Risk Stratification System (2015) (2)	Intermediate, n  = 22
	High, n  = 3
Recurrence after 1 year follow-up	n = 1

TNM, cancer tumor, node, metastasis classification for differentiated and anaplastic thyroid cancer (T1a, tumor size ≤ 1 cm in greatest dimension limited to the thyroid; T1b, tumor > 1 cm but ≤2 cm in greatest dimension, limited to the thyroid; T2, tumor size > 2 cm but ≤4 cm, limited to the thyroid; T3, tumor size > 4 cm, limited to the thyroid; T4, tumor with gross extrathyroidal extension; N, lymph node metastasis; M, metastasis; n, number of patients).