Does Tumor Size Influence the Diagnostic Accuracy of Ultrasound-Guided Fine-Needle Aspiration Cytology for Thyroid Nodules?

Table 2

Number of benign and malignant thyroid nodules in the different size and Bethesda reporting system categories.

Max. diameter	Nondiagnostic; ()	Benign; ()	AUS; ()	Suspicious FN; ()	Suspicious malignancy; ()	Malignancy; ()
	Benign/malignant	Benign/malignant	Benign/malignant	Benign/malignant	Benign/malignant	Benign/malignant
≤0.5 cm; ()	4/9	10/3	3/23	1/0	0/25	0/67
>0.5–1 cm; ()	6/5	31/9	11/31	3/2	2/36	0/132
>1-2 cm; ()	3/3	32/1	26/16	12/2	0/10	0/64
>2–4 cm; ()	1/0	23/2	19/8	7/7	0/4	0/9
>4 cm; ()	1/0	12/2	6/2	2/1	0/1	0/1

AUS: atypia of undetermined significance; : diameter; FN: follicular neoplasm.
The maximal diameter of the nodule on preoperative ultrasound was used for this analysis.