ObjectiveTo establish a predictive model for neck lateral lymph node metastasis (LLNM) in unilateral papillary thyroid cancer (uni-PTC) with central lymph node metastasis (CLNM). MethodsThe uni-PTC patients with CLNM were included in this study. The patients underwent thyroid surgery in the 960th Hospital of the PLA Joint Logistics Support Force from May 2018 to December 2021, who were randomly divided into the modeling group and the validation group according to the ratio of 7∶3. The risk factors of neck LLNM were analyzed by univariate and multivariate logistic regression and the nomogram of prediction model was constructed. The receiver operating characteristic (ROC) curve and calibration curve were used to validate the prediction model. ResultsA total of 237 patients were included in this study, including 158 patients in the modeling group and 79 patients in the validation group. The LLNM occurred in the 84 patients of the modeling group and 43 patients of the validation group. The multivariate logistic regression analysis was performed according to the statistical indicators in the univariate analysis results of the modeling group and the risk factors considered in the previous studies. The results showed that the patients with maximum diameter of the lesions >1 cm, multiple lesions, extraglandular invasion, the rate of CLNM ≥0.414, and lesions located at the upper portion had higher probability of LLNM (OR>1, P<0.05). The area under ROC curve of the nomogram in predicting LLNM in the modeling group was 0.834 [95%CI (0.771, 0.896)], which in the validation group was 0.761 [95%CI (0.651, 0.871)]. The calibration curve showed a good calibration degree in the prediction model. ConclusionThe clinical risk prediction model established based on the risk factors can better predict the probability of LLNM.
ObjectiveTo explore the risk factors for lateral lymph node metastasis (LLNM) in medullary thyroid carcinoma (MTC). MethodsA retrospective analysis was conducted on 132 MTC patients who underwent initial treatment in Zhejiang Cancer Hospital from March 2015 to July 2023. Chi-square test, Mann-Whitney nonparametric test and logistic regression were used to analyze the risk factors associated with LLNM in MTC patients by SPSS 22.0 software. ResultsOut of 132 MTC patients, 46 developed LLNM. Multivariate analysis showed that male (female vs. male: OR=0.139, P=0.005), high preoperative calcitonin (Ctn) level (OR=1.001, P=0.042), capsule invasion (OR=15.164, P<0.001), and central lymph node metastasis (OR=4.573, P=0.016) were independent risk factors for LLNM in MTC patients (P<0.05). When the preoperative serum Ctn of MTC patients was greater than 482.50 pg/mL, it indicated a high possibility of LLNM [AUC=0.856, 95%CI (0.791, 0.921)]. ConclusionsGender (male), capsule invasion, high Ctn level, and central lymph node metastasis are independent predictors of LLNM in MTC. For MTC patients with the aforementioned high-risk factors, clinical physicians need to be vigilant about the possibility of LLNM.
ObjectiveTo summarize the clinicopathological characteristics of papillary thyroid cancer (PTC) in adolescents and analyze the risk factors affecting lateral lymph node metastasis and prognosis. MethodsIn retrospectively, 150 adolescent PTC patients admitted to the Department of Thyroid Surgery of the First Affiliated Hospital of Zhengzhou University from January 2012 to January 2022 and meeting the inclusion and exclusion criterias were collected as the study subjects (adolescent group), and 100 adult PTC patients (adult group) were randomly selected. Statistical analysis was performed with SPSS 25.0 software to compare the clinicopathological characteristics of the patients in the two groups, and to explore the risk factors for lateral lymph node metastasis and recurrence in adolescent PTC patients by using logistic regression and Cox proportional hazards regression models, respectively. ResultsAdolescents with PTC were more prone to extrandular invasion [30.0% (45/150) versus 17.0% (17/100), P=0.020], neck lymph node metastasis [79.3% (119/150) versus 48.0% (48/100), P<0.001], central lymph node metastasis [78.7% (118/150) versus 48.0% (48/100), P<0.001], lateral lymph node metastasis [44.0% (66/150) versus 12.0% (12/100), P<0.001]; and had a greater maximum tumor diameter (1.75 cm versus 0.75 cm) and higher ratio of greater maximum tumor diameter ＞2 cm [（45.3% (68/150) versus 8.0% (8/100), P＜0.001] in adolescent PTC patients. In adolescent PTC patients, extraglandular invasion (OR=2.654, P=0.022), multifoci (OR=4.860, P<0.001) and maximum tumor diameter>2 cm (OR=3.845, P=0.001) were risk factors for lateral lymph node metastasis; lateral lymph node metastasis (RR=10.105, P=0.040) and distant metastasis (RR=7.058, P=0.003) were predictors of postoperative recurrence in adolescent PTC patients. ConclusionsCompared with adult PTC patients, adolescent PTC patients have more aggressive tumors. Adolescent PTC with extraglandular invasion, multilesions, and maximum tumor diameter>2 cm should be considered for lateral lymph node dissection; and adolescent PTC patients with lateral lymph node metastasis and distant metastasis should pay close attention to their recurrence status.