Table 4.
Specific Tg-FNA levels of 12 lymph nodes missed by FNAC
| No. | Thyroid condition | Lymph-node characteristics |
Cytological diagnosis | Tg-FNA (ng/mL) | Final diagnosis |
|---|---|---|---|---|---|
| 1 | Partial ablation | Cystic | Atypical cells | >500 | Metastatic PTC |
| 2 | Partial ablation | Cystic | Atypical cells | >500 | Metastatic PTC |
| 3 | Partial ablation | Cystic | Atypical cells | >500 | Metastatic PTC |
| 4 | Before surgery | Cystic | Atypical cells | 259.6 | Metastatic PTC |
| 5 | Before surgery | Cystic | Histocytes | >500 | Metastatic PTC |
| 6 | Before surgery | Cystic | Histocytes | >500 | Metastatic PTC |
| 7 | Total ablation | Cystic | Histocytes | >500 | Metastatic PTC |
| 8 | Before surgery | Cystic | Histocytes | 166.5 | Metastatic PTC |
| 9 | Total ablation | Cystic | Histocytes | 0.642 | Metastatic carcinoma (squamous carcinoma + a small amount of PTC) |
| 10 | Total ablation | Solid | Lymphocytes | 12.80 | Metastatic PTC |
| 11 | Total ablation | Solid | Lymphocytes | 20.12 | Metastatic PTC |
| 12 | Partial ablation | Solid | Atypical cells | 447.40 | Metastatic PTC |
Optimal cut-off value for Tg-FNA is 55.99 ng/mL for patients with thyroids and 9.71 ng/mL for patients without thyroids