Diagnosis of Follicular Lesions of Undetermined Significance in Fine-Needle Aspirations of Thyroid Nodules

Table 1

Characteristics of patients with follicular lesions of undetermined significance (FLUS) according to the Bethesda System for Reporting Thyroid Cytopathology (BSRTC).

	Number of patients/number of nodules; (𝑛=244/337)
Age, years (%)
>80	1 (0.4)
80–70	27 (11)
70–60	49 (20)
60–50	72 (29.6)
50–40	42 (17.3)
40–30	37 (15.1)
30–20	14 (5.8)
20–today	2 (0.8)
Thyroid condition
Goiter	142 (58.1)
Single nodule	67 (27.5)
Hashimoto thyroiditis	4 (1.7)
Basedow thyroiditis	2 (0.8)
Other thyroiditis	17 (7.0)
Hyperthyroiditis	2 (0.8)
Hypothyroiditis	4 (1.7)
NS	6 (2.4)
Nodule side
Left	155 (46)
Right	155 (46)
Isthmus	10 (2.9)
NS	17 (5.1)
Nodule size, mm
<10	17 (5.1)
10–20	116 (34.4)
21–30	77 (22.9)
31–40	32 (9.5)
41–50	23 (6.8)
>50	10 (2.9)
NS	62 (18.4)

Data are number (%).
NS: not specified.