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  • Author: Tingjie Yin x
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Shaodong Hou Department of Breast and Thyroid Surgery, Chongqing General Hospital, Chongqing, China
Clinical Medical College, North Sichuan Medical College, Nanchong, Sichuan, China

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Yiceng Sun Department of Breast and Thyroid Surgery, Chongqing General Hospital, Chongqing, China

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Zeyu Yang Department of Breast and Thyroid Surgery, Chongqing General Hospital, Chongqing, China

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Mi Tang Department of Breast and Thyroid Surgery, Chongqing General Hospital, Chongqing, China

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Tingjie Yin Department of Breast and Thyroid Surgery, Chongqing General Hospital, Chongqing, China

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Cong Shao Department of Breast and Thyroid Surgery, Chongqing General Hospital, Chongqing, China

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Cunye Yan Department of Breast and Thyroid Surgery, Chongqing General Hospital, Chongqing, China

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Linlong Mo Department of Breast and Thyroid Surgery, Chongqing General Hospital, Chongqing, China

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Yuquan Yuan Department of Breast and Thyroid Surgery, Chongqing General Hospital, Chongqing, China

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Supeng Yin Department of Breast and Thyroid Surgery, Chongqing General Hospital, Chongqing, China

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Fan Zhang Department of Breast and Thyroid Surgery, Chongqing General Hospital, Chongqing, China
Clinical Medical College, North Sichuan Medical College, Nanchong, Sichuan, China

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Objective

It is crucial to diagnose lymph node (LN) metastases (LNM) before or during thyroid carcinoma surgery. Measurement of thyroglobulin (Tg) in the fine needle aspirate washout (FNA-Tg) is useful to assist in the diagnosis of LNM for papillary thyroid carcinoma (PTC). This study aimed to assess the diagnostic performance of a new technique based on a colloidal gold-based immunochromatographic assay (GICA) for intraoperative FNA-Tg in diagnosing LNM.

Clinical trial information

This study is registered with chictr.org.cn, ID: ChiCTR2200063561 (registered 11 September, 2022).

Methods

This prospective study enrolled 51 PTC patients who underwent cervical LN dissection. A total of 150 LNs dissected from the central and lateral compartments were evaluated by FNA-Tg-GICA at three different time points and compared with frozen sections and the conventional Tg measurement method electrochemiluminescence immunoassay (ECLIA). Receiver operating characteristic curve (ROC) and area under the curve (AUC), cutoff value to discriminate benign and malignant LNs, sensitivity, specificity, and accuracy were provided.

Results

The cutoff value of FNA-Tg to predict LNM was 110.83 ng/mL for ECLIA and 13.19 ng/mL, 38.69 ng/mL, and 77.17 ng/mL for GICA at 3, 10, and 15 min, respectively. There was no significant difference between the AUCs of GICA at different time points compared to using ECLIA and frozen sections. Besides, the diagnostic performance of GICA and ECLIA showed no significant difference in evaluating LNM from central and lateral compartments or between the TgAb-positive subgroup and TgAb-negative subgroup.

Conclusion

GICA is a promising method for intraoperative FNA-Tg measurement and has high value in predicting LNM. It may be a novel alternative or supplementary method to frozen section or ECLIA.

Open access