Table 1.
Malignancy rate of each combined FNA/CNB result in nodules with a final diagnosis
| Diagnostic result (category)a) |
Final diagnosis (n=686) |
Malignancy rate (%) | ||
|---|---|---|---|---|
| FNA | CNB | Benign (n=405) | Malignancy (n=281) | |
| Nondiagnostic | Benign | 67 | 0 | 0 |
| Nondiagnostic | AUS/FLUS | 1 | 1 | 50 |
| Nondiagnostic | FN/SFN | 1 | 0 | 0 |
| Nondiagnostic | Suspicion of malignancy | 0 | 1 | 100 |
| Nondiagnostic | Malignant | 0 | 5 | 100 |
| Benign | Nondiagnostic | 5 | 0 | 0 |
| Benign | Benign | 318 | 0 | 0 |
| Benign | AUS/FLUS | 4 | 0 | 0 |
| Benign | FN/SFN | 0 | 1 | 100 |
| Benign | Malignant | 0 | 1 | 100 |
| AUS/FLUS | Benign | 2 | 0 | 0 |
| AUS/FLUS | AUS/FLUS | 3 | 4 | 57.1 |
| AUS/FLUS | FN/SFN | 2 | 5 | 71.4 |
| AUS/FLUS | Suspicion of malignancy | 0 | 7 | 100 |
| AUS/FLUS | Malignant | 0 | 17 | 100 |
| FN/SFN | FN/SFN | 2 | 1 | 33.3 |
| Suspicion of malignancy | Suspicion of malignancy | 0 | 4 | 100 |
| Suspicion of malignancy | Malignant | 0 | 59 | 100 |
| Malignant | Benign | 0 | 1 | 100 |
| Malignant | AUS/FLUS | 0 | 1 | 100 |
| Malignant | Suspicion of malignancy | 0 | 4 | 100 |
| Malignant | Malignant | 0 | 169 | 100 |
FNA, fine-needle aspiration; CNB, core needle biopsy; AUS/FLUS, atypia of undetermined significance/follicular lesion of undetermined significance; FN/SFN, follicular neoplasm/suspicious for a follicular neoplasm.
a)
Diagnoses according to the six categories of the Bethesda system.