Table 2.
Correlation of FNA cytology with histological diagnosis for the 791 cases
| Bethesda category | Nondiagnostic | Benign | AUS/FLUS | FN/SFN | Suspicious for malignancy | Malignancy | Total |
|---|---|---|---|---|---|---|---|
| Cases for surgery | 6 | 90 | 21 | 3 | 200 | 471 | 791 |
| Malignancy on surgery | 0 | 31 | 15 | 2 | 168 | 457 | 673 |
| ROM (%) | 0 | 34.4 | 71.4 | 66.7 | 69 | 97.0 | 85.1 |
| ROM from Zhang et al. [14] (%)a | 27.9 | 7.9 | 45.5 | 75.5 | 98.5 | 100 | 65.5 |
| ROM from Haugen [13] (%)b | 20 | 2.5 | 14 | 25 | 70 | 99 | Not available |
FNA, fine-needle aspiration; AUS/FLUS, atypia of undetermined significance or follicular lesion of undetermined significance; FN/SFN, follicular neoplasm or suspicious for a follicular neoplasm.
a
Risk of malignancy (ROM) in another two thyroid FNA practices in China;
b
ROM in practice in United States.