Luca Quagliato, Jiin Seo, Jiheun Hong, Taeyong Lee, Yoon-Sok Chung
{"title":"Synthetic Data-Enhanced Classification of Prevalent Osteoporotic Fractures Using Dual-Energy X-Ray Absorptiometry-Based Geometric and Material Parameters.","authors":"Luca Quagliato, Jiin Seo, Jiheun Hong, Taeyong Lee, Yoon-Sok Chung","doi":"10.3803/EnM.2024.2211","DOIUrl":"https://doi.org/10.3803/EnM.2024.2211","url":null,"abstract":"<p><strong>Background: </strong>Bone fracture risk assessment for osteoporotic patients is essential for implementing early countermeasures and preventing discomfort and hospitalization. Current methodologies, such as Fracture Risk Assessment Tool (FRAX), provide a risk assessment over a 5- to 10-year period rather than evaluating the bone's current health status.</p><p><strong>Methods: </strong>The database was collected by Ajou University Medical Center from 2017 to 2021. It included 9,260 patients, aged 55 to 99, comprising 242 femur fracture (FX) cases and 9,018 non-fracture (NFX) cases. To model the association of the bone's current health status with prevalent FXs, three prediction algorithms-extreme gradient boosting (XGB), support vector machine, and multilayer perceptron-were trained using two-dimensional dual-energy X-ray absorptiometry (2D-DXA) analysis results and subsequently benchmarked. The XGB classifier, which proved most effective, was then further refined using synthetic data generated by the adaptive synthetic oversampler to balance the FX and NFX classes and enhance boundary sharpness for better classification accuracy.</p><p><strong>Results: </strong>The XGB model trained on raw data demonstrated good prediction capabilities, with an area under the curve (AUC) of 0.78 and an F1 score of 0.71 on test cases. The inclusion of synthetic data improved classification accuracy in terms of both specificity and sensitivity, resulting in an AUC of 0.99 and an F1 score of 0.98.</p><p><strong>Conclusion: </strong>The proposed methodology demonstrates that current bone health can be assessed through post-processed results from 2D-DXA analysis. Moreover, it was also shown that synthetic data can help stabilize uneven databases by balancing majority and minority classes, thereby significantly improving classification performance.</p>","PeriodicalId":11636,"journal":{"name":"Endocrinology and Metabolism","volume":" ","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143984584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Si Woo Lee, Hyunki Park, Minyoung Lee, Hyangkyu Lee, Eun Seok Kang
{"title":"Sodium-Glucose Cotransporter-2 Inhibitor Enhances Hepatic Gluconeogenesis and Reduces Lipid Accumulation via AMPK-SIRT1 Activation and Autophagy Induction.","authors":"Si Woo Lee, Hyunki Park, Minyoung Lee, Hyangkyu Lee, Eun Seok Kang","doi":"10.3803/EnM.2024.2223","DOIUrl":"https://doi.org/10.3803/EnM.2024.2223","url":null,"abstract":"<p><strong>Background: </strong>Sodium-glucose cotransporter type 2 (SGLT2) inhibitors, such as dapagliflozin, are primarily used to lower glucose in type 2 diabetes. Recent studies suggest broader metabolic effects, particularly in the liver. This study explores the molecular mechanisms by which dapagliflozin influences hepatic glucose and lipid metabolism, hypothesizing that it activates the 5'-adenosine monophosphate-activated protein kinase (AMPK)-sirtuin 1 (Sirt1) pathway to promote gluconeogenesis and reduce lipid accumulation via autophagy.</p><p><strong>Methods: </strong>HepG2 hepatocellular carcinoma cells were treated with dapagliflozin, and Western blotting, quantitative reverse transcription polymerase chain reaction, and fluorescence microscopy were used to assess gluconeogenic enzyme expression and autophagy. In vivo, mice with liver-specific autophagy related 7 (Atg7) deletion and those on a high-fat diet were used to evaluate glucose regulation, lipid metabolism, and autophagy.</p><p><strong>Results: </strong>Dapagliflozin significantly increased expression of gluconeogenic enzymes like phosphoenolpyruvate carboxykinase (PEPCK) in HepG2 cells and enhanced autophagic flux, evidenced by increased light chain 3B (LC3B)-II levels and autophagosome formation. AMPK-Sirt1 activation was confirmed as the underlying mechanism. Additionally, dapagliflozin reduced fatty acid synthesis by suppressing enzymes such as acetyl-CoA carboxylase and fatty acid synthase, while promoting fatty acid degradation via carnitine palmitoyltransferase 1α (CPT1α) upregulation. In high-fat diet mice, dapagliflozin increased hepatic gluconeogenesis and reduced lipid accumulation, though serum cholesterol and triglyceride levels were unaffected.</p><p><strong>Conclusion: </strong>Dapagliflozin enhances hepatic gluconeogenesis and reduces steatosis by activating the AMPK-Sirt1 pathway and promoting autophagy. These findings suggest that SGLT2 inhibitors could offer therapeutic benefits for managing hepatic lipid disorders, beyond glycemic control.</p>","PeriodicalId":11636,"journal":{"name":"Endocrinology and Metabolism","volume":" ","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143984796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jin Yu, Ji-Hyun Kim, Bongseong Kim, Kyungdo Han, Seung Hwan Lee, Mee Kyoung Kim
{"title":"The Severity of Diabetes and the Risk of Diabetic Foot Amputation: A National Cohort Study.","authors":"Jin Yu, Ji-Hyun Kim, Bongseong Kim, Kyungdo Han, Seung Hwan Lee, Mee Kyoung Kim","doi":"10.3803/EnM.2024.2266","DOIUrl":"https://doi.org/10.3803/EnM.2024.2266","url":null,"abstract":"<p><strong>Background: </strong>This study aimed to assess whether markers of diabetes severity could serve as predictors for foot amputation risk among patients with type 2 diabetes mellitus.</p><p><strong>Methods: </strong>We analyzed data from the nationally representative Korean National Health Insurance System database, tracking 2,544,077 patients with type 2 diabetes mellitus who participated in routine health check-ups between 2009 and 2012, with followup extending through the end of 2018. The parameters used to define the diabetes severity score encompassed diabetes duration, insulin usage, the number of oral glucose-lowering medications, the presence of chronic kidney disease, diabetic retinopathy, and cardiovascular disease. Each factor was assigned one point, yielding a cumulative severity score ranging from 0 to 6.</p><p><strong>Results: </strong>The risk of diabetic foot amputation was predominantly predicted by insulin therapy, diabetic retinopathy, and a prolonged duration of diabetes. The hazard ratios for foot amputation increased with the severity score as follows: 2.31 (95% confidence interval [CI], 2.15 to 2.47) for a score of 1, 4.73 (95% CI, 4.42 to 5.07) for a score of 2, 8.86 (95% CI, 8.24 to 9.53) for a score of 3, 16.95 (95% CI, 15.60 to 18.4) for a score of 4, 23.98 (95% CI, 21.25 to 27.05) for a score of 5, and 37.87 (95% CI, 28.93 to 49.57) for a score of 6.</p><p><strong>Conclusion: </strong>Specific markers of advanced diabetes effectively identified patients at an elevated risk for diabetic foot amputation.</p>","PeriodicalId":11636,"journal":{"name":"Endocrinology and Metabolism","volume":" ","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143986123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In-Kyung Jeong, Hyuk-Sang Kwon, Dae Jung Kim, Sin Gon Kim
{"title":"Safety and Effectiveness of Pravastatin in Korean Patients with Dyslipidemia Based on the Cardiovascular Risk Classification: Pooled Analysis of Four Observational Studies.","authors":"In-Kyung Jeong, Hyuk-Sang Kwon, Dae Jung Kim, Sin Gon Kim","doi":"10.3803/EnM.2024.2200","DOIUrl":"https://doi.org/10.3803/EnM.2024.2200","url":null,"abstract":"<p><strong>Background: </strong>Despite their efficacy, statin-related adverse events (AEs) may interfere with statin treatment and contribute to negative outcomes in patients with cardiovascular diseases. In this study, we evaluated the safety and effectiveness of pravastatin in Korea.</p><p><strong>Methods: </strong>Pooled data were collected from four multicenter prospective observational studies conducted in Korea between 2011 and 2020. Finally, 7,334 and 2,022 participants were included in the safety and effectiveness analyses, respectively. Overall safety, particularly muscle-related, incidence of new-onset diabetes mellitus (DM), changes in fasting plasma glucose and hemoglobin A1c level, achievement of target low-density lipoprotein cholesterol (LDL-C) level, and changes in LDL-C level were analyzed.</p><p><strong>Results: </strong>At week 24, after 20 or 40 mg pravastatin treatment, safety results showed that AEs and adverse drug reactions (ADRs) were 8.7% and 1.3%, respectively, and that muscle-related AEs and ADRs were 0.5% and 0.3%, respectively, with no statistically significant difference in risk factors for statin-associated muscle symptoms. No patients developed DM during the study period. Additionally, at week 24, the achievement rates of target LDL-C levels were 87.9%, 78.4%, 57.8%, and 11.6% in low-, moderate-, high-, and very high-risk groups, respectively.</p><p><strong>Conclusion: </strong>This study found that 20 or 40 mg pravastatin had minimal side effects and was safe for use in real-world clinical settings in Korea. Specifically, these doses effectively achieved the target LDL-C levels in patients with dyslipidemia in low-, moderate-, and high-risk groups for atherosclerotic cardiovascular disease (ASCVD). These results demonstrate that pravastatin can be safely administered continuously to patients with low-, moderate-, and high-risk ASCVD in a real-world clinical setting.</p>","PeriodicalId":11636,"journal":{"name":"Endocrinology and Metabolism","volume":" ","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143983951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sujin Yoo, Eun-Seon Yoo, Jae Il Kim, Jong-Woo Sohn
{"title":"Exendin-4(1-32)K-Capric Acid, a Glucagon-Like Peptide-1 Receptor Agonist, Suppresses Food Intake via Arcuate Pro-Opiomelanocortin Neurons.","authors":"Sujin Yoo, Eun-Seon Yoo, Jae Il Kim, Jong-Woo Sohn","doi":"10.3803/EnM.2024.2185","DOIUrl":"https://doi.org/10.3803/EnM.2024.2185","url":null,"abstract":"<p><strong>Background: </strong>Glucagon-like peptide-1 (GLP-1) is an incretin known for its anti-obesity effects, and several effective drugs targeting GLP-1 receptors (GLP-1Rs) have recently been developed to treat obesity. Although GLP-1Rs are expressed by various populations of central neurons, it is still unclear which specific populations mediate the anti-obesity effects of GLP-1R agonists.</p><p><strong>Methods: </strong>In this study, we utilized the previously reported GLP-1R agonist, exendin-4(1-32)K-capric acid (Ex-4c), and conducted whole-cell patch-clamp recordings, immunohistochemistry experiments, and in vivo food intake measurements.</p><p><strong>Results: </strong>Our findings indicate that the appetite-suppressing effects of Ex-4c depend on pro-opiomelanocortin (POMC) neurons. Fos immunochemistry experiments and whole-cell patch-clamp recordings showed that Ex-4c activated POMC neurons in the arcuate nucleus of the hypothalamus. Additionally, we observed that Ex-4c stimulated GLP-1Rs and activated the protein kinase A (PKA)- dependent signaling pathway, which in turn closed putative adenosine triphosphate-sensitive K+ (KATP) channels, leading to the depolarization of POMC neurons.</p><p><strong>Conclusion: </strong>Our results demonstrate that the appetite-suppressing effects of Ex-4c are mediated through the activation of arcuate POMC neurons. Furthermore, the PKA-dependent closure of putative KATP conductance is identified as the cellular mechanism responsible for the activation of POMC neurons.</p>","PeriodicalId":11636,"journal":{"name":"Endocrinology and Metabolism","volume":" ","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143959093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hee-Sung Ahn, Eyun Song, Chae A Kim, Min Ji Jeon, Yu-Mi Lee, Tea-Yon Sung, Dong Eun Song, Jiyoung Yu, Ji Min Shin, Yeon-Sook Choi, Kyunggon Kim, Won Gu Kim
{"title":"Comprehensive Proteomics and Machine Learning Analysis to Distinguish Follicular Adenoma and Follicular Thyroid Carcinoma from Indeterminate Thyroid Nodules.","authors":"Hee-Sung Ahn, Eyun Song, Chae A Kim, Min Ji Jeon, Yu-Mi Lee, Tea-Yon Sung, Dong Eun Song, Jiyoung Yu, Ji Min Shin, Yeon-Sook Choi, Kyunggon Kim, Won Gu Kim","doi":"10.3803/EnM.2024.2208","DOIUrl":"https://doi.org/10.3803/EnM.2024.2208","url":null,"abstract":"<p><strong>Background: </strong>The preoperative diagnosis of follicular thyroid carcinoma (FTC) is challenging because it cannot be readily distinguished from follicular adenoma (FA) or benign follicular nodular disease (FND) using the sonographic and cytological features typically employed in clinical practice.</p><p><strong>Methods: </strong>We employed comprehensive proteomics and machine learning (ML) models to identify novel diagnostic biomarkers capable of classifying three subtypes: FTC, FA, and FND. Bottom-up proteomics techniques were applied to quantify proteins in formalin-fixed, paraffin-embedded (FFPE) thyroid tissues. In total, 202 FFPE tissue samples, comprising 62 FNDs, 72 FAs, and 68 FTCs, were analyzed.</p><p><strong>Results: </strong>Close spectrum-spectrum matching quantified 6,332 proteins, with approximately 9% (780 proteins) differentially expressed among the groups. When applying an ML model to the proteomics data from samples with preoperative indeterminate cytopathology (n=183), we identified distinct protein panels: five proteins (CNDP2, DNAAF5, DYNC1H1, FARSB, and PDCD4) for the FND prediction model, six proteins (DNAAF5, FAM149B1, RPS9, TAGLN2, UPF1, and UQCRC1) for the FA model, and seven proteins (ACTN4, DSTN, MACROH2A1, NUCB1, SPTAN1, TAGLN, and XRCC5) for the FTC model. The classifiers' performance, evaluated by the median area under the curve values of the random forest models, was 0.832 (95% confidence interval [CI], 0.824 to 0.839) for FND, 0.826 (95% CI, 0.817 to 0.835) for FA, and 0.870 (95% CI, 0.863 to 0.877) for FTC.</p><p><strong>Conclusion: </strong>Quantitative proteome analysis combined with an ML model yielded an optimized multi-protein panel that can distinguish FTC from benign subtypes. Our findings indicate that a proteomic approach holds promise for the differential diagnosis of FTC.</p>","PeriodicalId":11636,"journal":{"name":"Endocrinology and Metabolism","volume":" ","pages":""},"PeriodicalIF":3.9,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143987247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ultrasound Imaging Criteria and Protocols for Active Surveillance of Low-Risk Thyroid Cancer: A Review of International Consensus Guidelines.","authors":"Ji Ye Lee, Dong Gyu Na","doi":"10.3803/EnM.2024.2319","DOIUrl":"10.3803/EnM.2024.2319","url":null,"abstract":"<p><p>Given the indolent nature and favorable outcomes of papillary thyroid microcarcinoma (PTMC), active surveillance (AS) has been adopted as an alternative management option to immediate surgery. However, the meticulous selection of patients based on individual and tumor-specific characteristics, as well as ultrasound (US) findings, is crucial in AS. Regular US monitoring is performed during AS to detect indicators of tumor progression, such as growth, the emergence of new US features suggestive of gross extrathyroidal extension, and lymph node metastasis. Thus, imaging-based evaluations play a pivotal role in guiding the decision to continue AS or proceed with surgical intervention. This review introduces the Korean Society of Thyroid Radiology (KSThR) guideline for the standardized US imaging of patients with low-risk PTMC under AS, which provide practical recommendations for tumor assessment during the initiation and follow-up phases of AS. This review compared the key features of the KSThR guideline with those of major international guidelines and identified the similarities and differences in imaging methodologies and follow-up strategies. The primary objective of this review is to support the broader implementation of AS and improve outcomes for patients with low-risk PTMC by emphasizing imaging protocols.</p>","PeriodicalId":11636,"journal":{"name":"Endocrinology and Metabolism","volume":" ","pages":"185-194"},"PeriodicalIF":3.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12061737/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143718157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Plasma C-Peptide Level and Continuous Glucose Monitoring-Derived Coefficient of Variation as a Predictable Risk Factor for Hypoglycemia in Koreans with Diabetes.","authors":"Seung-Hyun Ko","doi":"10.3803/EnM.2025.2403","DOIUrl":"https://doi.org/10.3803/EnM.2025.2403","url":null,"abstract":"","PeriodicalId":11636,"journal":{"name":"Endocrinology and Metabolism","volume":"40 2","pages":"198-200"},"PeriodicalIF":3.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12061744/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143964495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Bridging Global and Local Perspectives on Primary Aldosteronism.","authors":"Ohk-Hyun Ryu","doi":"10.3803/EnM.2025.2361","DOIUrl":"10.3803/EnM.2025.2361","url":null,"abstract":"","PeriodicalId":11636,"journal":{"name":"Endocrinology and Metabolism","volume":" ","pages":"195-197"},"PeriodicalIF":3.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12061747/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143802828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jae Hoon Moon, Eun Kyung Lee, Wonjae Cha, Young Jun Chai, Sun Wook Cho, June Young Choi, Sung Yong Choi, A Jung Chu, Eun-Jae Chung, Yul Hwangbo, Woo-Jin Jeong, Yuh-Seog Jung, Kyungsik Kim, Min Joo Kim, Su-Jin Kim, Woochul Kim, Yoo Hyung Kim, Chang Yoon Lee, Ji Ye Lee, Kyu Eun Lee, Young Ki Lee, Hunjong Lim, Do Joon Park, Sue K Park, Chang Hwan Ryu, Junsun Ryu, Jungirl Seok, Young Shin Song, Ka Hee Yi, Hyeong Won Yu, Eleanor White, Katerina Mastrocostas, Roderick J Clifton-Bligh, Anthony Glover, Matti L Gild, Ji-Hoon Kim, Young Joo Park
{"title":"Study Protocol of Expanded Multicenter Prospective Cohort Study of Active Surveillance on Papillary Thyroid Microcarcinoma (MAeSTro-EXP).","authors":"Jae Hoon Moon, Eun Kyung Lee, Wonjae Cha, Young Jun Chai, Sun Wook Cho, June Young Choi, Sung Yong Choi, A Jung Chu, Eun-Jae Chung, Yul Hwangbo, Woo-Jin Jeong, Yuh-Seog Jung, Kyungsik Kim, Min Joo Kim, Su-Jin Kim, Woochul Kim, Yoo Hyung Kim, Chang Yoon Lee, Ji Ye Lee, Kyu Eun Lee, Young Ki Lee, Hunjong Lim, Do Joon Park, Sue K Park, Chang Hwan Ryu, Junsun Ryu, Jungirl Seok, Young Shin Song, Ka Hee Yi, Hyeong Won Yu, Eleanor White, Katerina Mastrocostas, Roderick J Clifton-Bligh, Anthony Glover, Matti L Gild, Ji-Hoon Kim, Young Joo Park","doi":"10.3803/EnM.2024.2136","DOIUrl":"10.3803/EnM.2024.2136","url":null,"abstract":"<p><strong>Background: </strong>Active surveillance (AS) has emerged as a viable management strategy for low-risk papillary thyroid microcarcinoma (PTMC), following pioneering trials at Kuma Hospital and the Cancer Institute Hospital in Japan. Numerous prospective cohort studies have since validated AS as a management option for low-risk PTMC, leading to its inclusion in thyroid cancer guidelines across various countries. From 2016 to 2020, the Multicenter Prospective Cohort Study of Active Surveillance on Papillary Thyroid Microcarcinoma (MAeSTro) enrolled 1,177 patients, providing comprehensive data on PTMC progression, sonographic predictors of progression, quality of life, surgical outcomes, and cost-effectiveness when comparing AS to immediate surgery. The second phase of MAeSTro (MAeSTro-EXP) expands AS to low-risk papillary thyroid carcinoma (PTC) tumors larger than 1 cm, driven by the hypothesis that overall risk assessment outweighs absolute tumor size in surgical decision-making.</p><p><strong>Methods: </strong>This protocol aims to address whether limiting AS to tumors smaller than 1 cm may result in unnecessary surgeries for low-risk PTCs detected during their rapid initial growth phase. By expanding the AS criteria to include tumors up to 1.5 cm, while simultaneously refining and standardizing the criteria for risk assessment and disease progression, we aim to minimize overtreatment and maintain rigorous monitoring to improve patient outcomes.</p><p><strong>Conclusion: </strong>This study will contribute to optimizing AS guidelines and enhance our understanding of the natural course and appropriate management of low-risk PTCs. Additionally, MAeSTro-EXP involves a multinational collaboration between South Korea and Australia. This cross-country study aims to identify cultural and racial differences in the management of low-risk PTC, thereby enriching the global understanding of AS practices and their applicability across diverse populations.</p>","PeriodicalId":11636,"journal":{"name":"Endocrinology and Metabolism","volume":" ","pages":"236-246"},"PeriodicalIF":3.9,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12061745/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143440254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}