PMID- 37596455 OWN - NLM STAT- MEDLINE DCOM- 20240208 LR - 20240209 IS - 1559-0100 (Electronic) IS - 1355-008X (Linking) VI - 83 IP - 2 DP - 2024 Feb TI - Lateral lymph node metastasis in papillary thyroid microcarcinoma: a study of 5241 follow-up patients. PG - 414-421 LID - 10.1007/s12020-023-03486-5 [doi] AB - PURPOSE: To investigate the impact of lateral lymph node metastasis in papillary thyroid microcarcinoma (PTMC). METHODS: 5241 PTMC patients with follow-up information were enrolled in the current study. These patients underwent primary surgery in our situation from January 1997 to December 2016. Additionally, a validation cohort consisting of 274 PTMC patients who underwent primary surgery between January 2020 and December 2021 was also included. Univariable and multivariate logistic analyses were conducted to identify the association between clinicopathologic features and lateral lymph node metastasis (LLNM). Kaplan-Meier survival curve analysis was used to calculate the disease-free survival (DFS) rate. The fitting curve was generated to identify the quantitative relationship between central lymph node metastases (CLNM) and LLNM. RESULTS: Of 5241 PTMC patients, cervical lymph node metastasis was detected in 1494 (28.5%) cases, including 1364 (26.0%) with CLNM only and 130 (2.5%) with LLNM. With a median follow-up time of 60 months (interquartile range [IQR], 44-81), recurrence was detected in 114 patients (2.2%). Multivariate Cox regression analyses showed that LNM was the only independent risk factor for recurrence, with HR values of 3.03 in CLNM and 11.14 in LLNM, respectively. Tumor diameter >0.5 cm (hazard ratio [HR]:1.80), multifocality (HR:2.59), bilaterality (HR:2.13), extrathyroidal invasion (HR:2.13), and CLNM (HR:5.11) were independent risk factors for LLNM. The prevalence of LLNM escalated significantly with increasing number of lymph node involvement in CLNM when stratified by the number of metastatic lymph nodes and trend was observed similarly in the validation cohort. The fitting curve showed that the incidence of LLNM could be as high as 20.7% when the number of CLNM >/= 5. CONCLUSIONS: By analyzing a large database with follow-up information, our study provides evidence that LLNM is significantly correlated with tumor recurrence in patients with PTMC. Tumor size (>0.5 cm), multifocality, bilaterality, extrathyroidal extension (ETE) and CLNM are independent risk factors for LLNM. CI - (c) 2023. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature. FAU - Ruan, Jiaying AU - Ruan J AD - Department of Surgical Oncology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China. FAU - Chen, Zhendong AU - Chen Z AD - Department of Surgical Oncology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China. FAU - Chen, Shitu AU - Chen S AD - Department of Surgical Oncology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China. FAU - Xu, Zehang AU - Xu Z AD - Department of Surgical Oncology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China. FAU - Wen, Liping AU - Wen L AD - Department of Surgical Oncology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China. FAU - Mao, Zhuochao AU - Mao Z AD - Department of Surgical Oncology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China. FAU - Shen, Jiejie AU - Shen J AD - Community Health Service Center, Jingjiang Street, Xiaoshan District, Hangzhou, China. FAU - Liu, Jian AU - Liu J AD - Department of Surgical Oncology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China. liujianzy@zju.edu.cn. FAU - Wang, Weibin AU - Wang W AD - Department of Surgical Oncology, First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China. wbwang@zju.edu.cn. LA - eng GR - No. 81972495/National Natural Science Foundation of China/ PT - Journal Article DEP - 20230818 PL - United States TA - Endocrine JT - Endocrine JID - 9434444 RN - Papillary Thyroid Microcarcinoma SB - IM MH - Humans MH - Lymphatic Metastasis/pathology MH - Follow-Up Studies MH - Retrospective Studies MH - *Neoplasm Recurrence, Local/pathology MH - *Thyroid Neoplasms/pathology MH - Lymph Nodes/pathology MH - Risk Factors MH - *Carcinoma, Papillary OTO - NOTNLM OT - Lateral lymph node metastasis OT - Papillary thyroid microcarcinoma OT - Risk factors OT - prognosis EDAT- 2023/08/19 11:42 MHDA- 2024/02/08 06:42 CRDT- 2023/08/18 23:30 PHST- 2023/03/21 00:00 [received] PHST- 2023/08/07 00:00 [accepted] PHST- 2024/02/08 06:42 [medline] PHST- 2023/08/19 11:42 [pubmed] PHST- 2023/08/18 23:30 [entrez] AID - 10.1007/s12020-023-03486-5 [pii] AID - 10.1007/s12020-023-03486-5 [doi] PST - ppublish SO - Endocrine. 2024 Feb;83(2):414-421. doi: 10.1007/s12020-023-03486-5. Epub 2023 Aug 18.