Diagnostic value of Thyroglobulin Measurement with Fine-needle Aspiration Biopsy for Lymph Node Metastases in Patients with a History of Differentiated Thyroid Cancer

Zhang, Hai-Shan; Wang, Ren-Jie; Fu, Qing-Feng; Gao, Shi; Sun, Bu-Tong; Sun, Hui; Ma, Qing-Jie

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자료유형: 학술저널

저자정보: Zhang, Hai-Shan (Department of Surgery, China-Japan Union Hospital, Jilin University) Wang, Ren-Jie (Department of Nuclear Medicine, China-Japan Union Hospital, Jilin University) Fu, Qing-Feng (Department of Surgery, China-Japan Union Hospital, Jilin University) Gao, Shi (Department of Nuclear Medicine, China-Japan Union Hospital, Jilin University) Sun, Bu-Tong (Department of Nuclear Medicine, China-Japan Union Hospital, Jilin University) Sun, Hui (Department of Surgery, China-Japan Union Hospital, Jilin University) Ma, Qing-Jie (Department of Nuclear Medicine, China-Japan Union Hospital, Jilin University)

저널정보: 아시아태평양암예방학회 Asian Pacific journal of cancer prevention : APJCP Asian Pacific journal of cancer prevention : APJCP 제15권 제24호

발행연도: 2014.1

수록면: 10,905 - 10,909 (5page)

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Purpose: The aim of this study was to evaluate the diagnostic value of FNA-Tg for detecting lymph node metastases in patients with a history of differentiated thyroid cancer (DTC). Materials and Methods: A total of 58 patients with DTC diagnosis and evidence of single or multiple suspicious cervical lymph nodes were assessed. All underwent total or near-total thyroidectomy with (35 cases) or without (23 cases) radioiodine (RAI) ablation, followed by thyroid stimulating hormone (TSH) suppression therapy. A total of 68 lymph nodes were examined by ultrasound-guided fine needle aspiration (US-FNA) for both cytological examination and FNA-Tg measurement. Serum Tg and anti-thyroglobulin antibody (TgAb) levels were also measured. Diagnostic performance including sensitivity, specificity, accuracy, positive (PPV) and negative predictive value (NPV) of FNAC and FNA-Tg were calculated and compared. The Spearman's rank correlation coefficient was used to estimate the relationship between FNA-Tg and serum TgAb. Results: The FNA-Tg levels were significantly higher with DTC metastatic lymph nodes (median 927.7 ng/mL, interquartile range 602.9 ng/mL) than non-metastatic lymph nodes (median 0.1 ng/mL, interquartile range 0.4 ng/mL) (p<0.01). Considering 1.0 ng/mL as a threshold value for FNA-Tg, the sensitivity, specificity, accuracy, PPV and NPV of FNA-Tg were 95.7%, 95.5%, 95.6%, 97.8% and 91.3%, respectively. The sensitivity and accuracy of the combination of FNAC and FNA-Tg were significantly higher than that of FNAC alone (p<0.05). The diagnostic performance of FNA-Tg was not significantly different between cases with or without RAI ablation, and the serum TgAb levels did not interfere with FNA-Tg measurements. Conclusions: Measurement of FNA-Tg is useful. The combination of FNAC and FNA-Tg is more sensitive and accurate for detecting lymph node metastases in patients with a history of DTC than FNAC alone. Serum TgAbs appear to be irrelevant for measurement of FNA-Tg.

#Differentiated thyroid cancer-fine #needle aspiration biopsy #cervical lymph node metastases #thyroglobulin

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