Table 1.

Clinico-pathologic characteristics of patients with unifocal papillary microcarcinoma, noninvasive encapsulated follicular variant (mPTC, NI-EFV) included in the study

All patients (n = 52)
Gender	Female	45	87%
	Male	7	13%
Age, median (range)		52 (27 – 81)
Clinical presentation	Incidental finding	39	75%
	Non-incidental	13	25%
Size, cm, median of all tumors (range)		0.44 (0.1 – 0.9)
Size of non-incidental tumor, cm, median (range)		0.7 (0.4 – 0.9)
Sampling of the thyroid gland	Entirely sampled	23	44%
	Representatively Sampled	29	56%
Sections of thyroid sampled, mean, median (range)		12, 10 (2 – 26)
Sampling and status of lymph nodes	pNx: Not sampled	32	62%
	pN0: Benign lymph node(s) N0	20	38%
Surgical procedure	Lobectomy	23	44%
	Total thyroidectomy	29	56%
Encapsulation	Encapsulated	22	42%
	Well circumscribed	30	58%
Other benign tumors	Adenoma	9	17%
	None	45	83%
Follow up duration, years, median (range)		4.3 (1.0–18.1)
Disease status at last follow up (FU)	No evidence of disease (NED)	52	100%
Patients with at least 2 year follow up (n = 38)
Surgical procedure	Lobectomy/hemithyroidectomy	15	39%
	Total thyroidectomy	23	61%
Follow up duration, years, median (range)		6.3 (2.0 –18.1)
Disease status at last FU	NED	38	100%
Patients with at least 5 year follow up (n = 25)
Surgical procedure	Lobectomy	12	48%
	Total/subtotal thyroidectomy	13	52%
Follow up duration, years, median (range)		9.6 (5.2–18.1)
Disease status at last FU	NED	25	100%

^aAll values are expressed as N and % of column total unless otherwise specified.