Table 1.

Italian consensus statement AIT, AME, SIE and SIAPEC-IAP for the classification and reporting of thyroid cytology [16, 17]

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)