Table 2.
Number of benign and malignant thyroid nodules in the different size and Bethesda reporting system categories.
| Max. diameter | Nondiagnostic (n = 32) |
Benign (n = 125) |
AUS (n = 145) |
Suspicious FN (n = 37) |
Suspicious malignancy (n = 78) |
Malignancy (n = 273) |
|---|---|---|---|---|---|---|
| Benign/malignant | Benign/malignant | Benign/malignant | Benign/malignant | Benign/malignant | Benign/malignant | |
| ≤0.5 cm (n = 145) |
4/9 | 10/3 | 3/23 | 1/0 | 0/25 | 0/67 |
| >0.5–1 cm (n = 268) |
6/5 | 31/9 | 11/31 | 3/2 | 2/36 | 0/132 |
| >1-2 cm (n = 169) |
3/3 | 32/1 | 26/16 | 12/2 | 0/10 | 0/64 |
| >2–4 cm (n = 80) |
1/0 | 23/2 | 19/8 | 7/7 | 0/4 | 0/9 |
| >4 cm (n = 28) |
1/0 | 12/2 | 6/2 | 2/1 | 0/1 | 0/1 |
AUS: atypia of undetermined significance; d: diameter; FN: follicular neoplasm.
The maximal diameter of the nodule on preoperative ultrasound was used for this analysis.