From: Role of the cytopathologist during the procedure of fine-needle aspiration biopsy of thyroid nodules
Code | Diagnostic category | Risk of malignancy | Management |
---|---|---|---|
TIR 1 | Non-diagnostic | Not determinated | Repeat US-guided FNAB |
TIR 1C | Non-diagnostic cystic | Low risk | Evaluate clinical context and eventually repeat US-guided FNAB |
TIR 2 | Non-malignant (benign) | < 3% | Follow-up |
TIR 3A | Low risk indeterminate | < 10% | Repeat FNAB/ Follow-up |
TIR 3B | High risk indeterminate | 15–30% | Surgical excision |
TIR 4 | Suspicion of malignancy | 60–80% | Surgical excision with intraoperative examination |
TIR 5 | Malignant | 95% | Surgical excision with diagnostic in-depth in selected cases (metastasis, lymphoma) |