Table 4 Comparison of malignancy rates by FNA category among this study, the Bethesda System, and published values in other studies
From: Rates of thyroid malignancy by FNA diagnostic category
| FNA category | This study n = 388 | Bethesda range | Yang et al., 2007[3] n = 1052 | Jo et al., 2010[4] n = 892 | Wu, 2011[5] n = 221 |
|---|---|---|---|---|---|
| Unsatisfactory | 18.2 | 1-4 | 10.9 | 8.9 | 14 |
| Benign | 16.0 | 0-3 | 7.3 | 6.5 | 3 |
| Abnormal | 24.7 | 5-15 | 13.5 | 17 | 6 |
| SFN | 32.6 | 15-30 | 32.2 | 25.4 | 22 |
| SFM | 94.1 | 60-75 | 64.7 | 70 | 56 |
| Malignant | 100.0 | 97-99 | 98.6 | 98.1 | 100 |
| Overall | 28.4 | -- | 45.3 | 31.3 | 29.0 |