Thyroglobulin Measurement in Needle Aspiration for Detection of Recurrences and Neck Metastases in Patients with Differentiated Thyroid Carcinoma: Significance of Anti-Tg Antibodies (CROSBI ID 290632)
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Blažeković, Ivan ; Romić, Matija ; Bosak Butković, Marija ; Šiško Markoš, Ines ; Gladić Nenadić, Vedrana ; Vidranski, Valentina ; Petranović Ovčariček, Petra ; Krilić, Dražena ; Varjačić, Tea ; Staničić, Josip ; Granić, Roko ; Punda, Marija ; Mihaljević, Ivan ; Jukić, Tomislav ; Franceschi, Maja
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Thyroglobulin Measurement in Needle Aspiration for Detection of Recurrences and Neck Metastases in Patients with Differentiated Thyroid Carcinoma: Significance of Anti-Tg Antibodies
The worldwide incidence of differentiated thyroid cancer (DTC) has increased in recent decades, likely due to frequent use of cervical ultrasonography (US) and US-guided fine needle aspiration biopsy (FNA)., US is performed during follow-up after thyroidectomy, and US-guided FNA with cytology is used if suspicious cervical lymph nodes (LN ) or thyroid bed masses are detected. Knowing that serum anti-Tg antibodies (sTgAb) affect the use of serum Tg (sTg) as a tumor marker, the aim of our study was to assess the usefulness of Tg determination in needle aspirates (FNA-Tg) in presence of sTgAb. This retrospective study included 149 patients with DTC and 159 aspirations of suspicious LN and thyroid bed masses. As expected, there was a negative correlation between sTg and sTgAb levels (p<0.05), while FNA-Tg levels had a positive correlation with FNATgAb levels (p<0.05). Furthermore, we found a positive correlation between sTg and FNA-Tg levels (p<0.05), but not between sTgAb and FNA-TgAb or sTgAb and FNA-Tg. In conclusion, these results show that FNA-Tg values were not affected by sTgAb and that FNA-Tg measurement were highly effective in detecting cervical DTC metastases. However, combined use with cytology is suggested for neck evaluation because cytology could reveal metastases from other tumor sites.
neck ultrasonography, differentiated thyroid carcinoma, fine needle aspiration (FNA), serum thyroglobulin (sTg), serum anti-Tg antibodies (sTg-Ab), thyroglobulin (Tg) in FNA (FNA-Tg), FNA anti-Tg antibodies (FNA-TgAb)
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