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

Table 3

Distribution of FLUS criteria in our series.

Cytological criteria (511 for 354 FLUS)	Number of lesions (%)
Microfollicular architecture but sparse cellularity	118 (23.1)
Predominant oncocytic cells with low cellularity	19 (3.7)
Predominant oncocytic cells and goiter or Hashimoto thyroiditis	3 (0.6)
Cytological atypia suggesting papillary carcinoma	184 (36.0)
Cytological atypia	110 (21.5)
Cytological atypia due to technical artifact	0 (0)
Atypical “cyst lining cells”	0 (0)
Abnormal lymphocytic population	0 (0)
Other
Giant cells	13 (2.5)
Low cellularity	60 (11.7)
Low colloid	4 (0.8)