Table 2.
Cytological diagnoses of secondary thyroid cancers by fine needle aspiration.
| Author (Year) | No. of FNAs Performed on STCs | Proportion of STCs Diagnosed Correctly as Metastasis on FNA | Proportion of STCs Diagnosed as Suspicious for Malignancy/Unknown Primary on FNA | Proportion of STCs with Other Diagnoses on FNA |
|---|---|---|---|---|
| HooKim et al. (2015) | 28 | 85.7% | 14.3% | 0% |
| Hegerova et al. (2015) | 97 | 94% | 0% | 6% follicular neoplasm or papillary thyroid carcinoma |
| Pusztaszeri et al. 2015 | 62 | 81% | 0% | 8% nondiagnostic 5% follicular neoplasm 7% primary thyroid cancer |
| Choi et al. (2016) | 41 | 46.3% | 24.4% | 4.9% benign 9.8% nondiagnostic 4.9% atypia or follicular lesion of undetermined significance 9.8% others |
| Straccia et al. (2017)–meta-analysis | 154 | 72.7% | 26.6% | 0.65% primary thyroid cancer |
| Zivaljevic et al. (2018) | 6 | 33% | Nil data provided | Nil data provided |
| Stergianos et al. (2021) | 29 | 41.4% | Nil data provided | 0.07% follicular neoplasm 0.03% benign 0.03% papillary thyroid cancer 0.03% anaplastic thyroid cancer |
FNA, fine-needle aspiration; STC, secondary thyroid cancer.