From: Rates of thyroid malignancy by FNA diagnostic category
FNA diagnosis
This study N = 1491
Yang et al., 2007[3] N = 4703
Jo et al., 2010[4] N = 3080
Wu et al., 2011[5] N = 1382
Unsatisfactory
28.9
10.4
18.6
20.1
Benign
45.7
64.6
59.0
39.0
Abnormal
18.8
3.2
3.4
27.2
SFN
4.4
11.6
9.7
8.4
SFM
1.3
2.6
2.3
Malignant
0.9
7.6
7.0
2.7