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Korean Journal of Clinical Oncology > Article
Korean J Clin Oncol. 2021;17(2): 117-121.         doi: https://doi.org/10.14216/kjco.21018
Utility of sentinel lymph node biopsy in papillary thyroid microcarcinoma
Hyun Yul Kim1 , Dong-il Kim1 , Chang Shin Jung1 , Seung Joo Lee1 , Dong Won Im1 , Youn Joo Jung1 , Jeong-a Yeom2 , Jeong Bum Choi3
1Department of Surgery, Pusan National University Yangsan Hospital, Yangsan, Korea
2Department of Radiology, Pusan National University Yangsan Hospital, Yangsan, Korea
3Department of Surgery, Pusan National University Hospital, Busan, Korea
Corresponding Author: Dong-il Kim ,Tel: +82-55-360-2124, Fax: +82-55-360-2154, Email: led117@naver.com
Received: June 18, 2021;  Accepted: December 6, 2021.
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Purpose: There are many studies on sentinel lymph node (SLN) biopsy in thyroid carcinoma but SLN biopsy (SLNB) in papillary thyroid carcinoma (PTC) remains open to debate. Therefore in this retrospective study, the usefulness of SLNB in thyroid carcinoma patients who had micro-PTC without cervical lymphadenopathy was assessed.
Methods: SLNB was performed in 114 patients who were diagnosed with micro-PTC in a single lobe without palpable or ultrasound-detected lymph node at the tertiary center between January 2012 and December 2013. After SLNB, all patients underwent total thyroidectomy and central neck dissection or thyroid lobectomy and central neck dissection of the single side.
Results: SLNs were identified in 112 of 114 patients with 41 positive SLNs and 71 negative SLNs on intraoperative frozen sections. However, eight negative patients were found to be positive in the final pathology. Sentinel node identification rate and false negative value of SLNB were 98.2% and 11.3%, respectively. In the univariate analysis, higher lymph node metastasis was detected in men than in women. Higher detection number of SLN showed higher probability of lymph node metastasis.
Conclusion: SLNB may be helpful in papillary thyroid cancer, especially in male patients. Also, it is useful for the staging of nodal status and clearance of persistent disease.
Keywords: Papillary thyroid carcinoma | Thyroid cancer | Lymph nodes | Sentinel lymph node biopsy | Neck dissection
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