Endocrinology and Metabolism

Original Articles

Hypothalamus and pituitary gland
Genetic Landscape and Clinical Manifestations of Multiple Endocrine Neoplasia Type 1 in a Korean Cohort: A Multicenter Retrospective Analysis: Boram Kim, Seung Hun Lee, Chang Ho Ahn, Han Na Jang, Sung Im Cho, Jee-Soo Lee, Yu-Mi Lee, Su-Jin Kim, Tae-Yon Sung, Kyu Eun Lee, Woochang Lee, Jung-Min Koh, Moon-Woo Seong, Jung Hee Kim; Endocrinol Metab. 2024;39(6):956-964. Published online November 18, 2024; DOI: https://doi.org/10.3803/EnM.2024.2008

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Background
Multiple endocrine neoplasia type 1 (MEN1) is an autosomal dominant disorder characterized by tumors in multiple endocrine organs, caused by variants in the MEN1 gene. This study analyzed the clinical and genetic features of MEN1 in a Korean cohort, identifying prevalent manifestations and genetic variants, including novel variants.
Methods
This multicenter retrospective study reviewed the medical records of 117 MEN1 patients treated at three tertiary centers in Korea between January 2012 and September 2022. Patient demographics, tumor manifestations, outcomes, and MEN1 genetic testing results were collected. Variants were classified using American College of Medical Genetics and Genomics (ACMG) and French Oncogenetics Network of Neuroendocrine Tumors propositions (TENGEN) guidelines.
Results
A total of 117 patients were enrolled, including 55 familial cases, with a mean age at diagnosis of 37.4±15.3 years. Primary hyperparathyroidism was identified as the most common presentation (84.6%). The prevalence of gastroenteropancreatic neuroendocrine tumor and pituitary neuroendocrine tumor (PitNET) was 77.8% (n=91) and 56.4% (n=66), respectively. Genetic testing revealed 61 distinct MEN1 variants in 101 patients, with 18 being novel. Four variants were reclassified according to the TENGEN guidelines. Patients with truncating variants (n=72) exhibited a higher prevalence of PitNETs compared to those with non-truncating variants (n=25) (59.7% vs. 36.0%, P=0.040).
Conclusion
The association between truncating variants and an increased prevalence of PitNETs in MEN1 underscores the importance of genetic characterization in guiding the clinical management of this disease. Our study sheds light on the clinical and genetic characteristics of MEN1 among the Korean population.

Citations

Citations to this article as recorded by

Risk Factors for Pituitary Adenoma Development in Multiple Endocrine Neoplasia Type 1: A Nationwide Study of 240 Cases
Nuria Valdés, Ana R Romero-Lluch, Estrella Diego, María Calatayud, Cristina Lamas, Marta Araujo-Castro, Rosa Martínez, Josep Oriola, Cristina Álvarez-Escolá, Ángel Díaz Pérez, Victoria Alcázar, Julia Sastre, María Isabel del Olmo, Evangelina Boix, Almuden
The Journal of Clinical Endocrinology & Metabolism.2026; 111(3): e811. CrossRef

Adrenal gland
The Modified S-GRAS Scoring System for Prognosis in Korean with Adrenocortical Carcinoma: Sun Kyung Baek, Seung Hun Lee, Seung Shin Park, Chang Ho Ahn, Sung Hye Kong, Won Woong Kim, Yu-Mi Lee, Su Jin Kim, Dong Eun Song, Tae-Yon Sung, Kyu Eun Lee, Jung Hee Kim, Kyeong Cheon Jung, Jung-Min Koh; Endocrinol Metab. 2024;39(5):803-812. Published online September 25, 2024; DOI: https://doi.org/10.3803/EnM.2024.2086

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Background
Adrenocortical carcinomas (ACCs) are rare tumors with aggressive but varied prognosis. Stage, Grade, Resection status, Age, Symptoms (S-GRAS) score, based on clinical and pathological factors, was found to best stratify the prognosis of European ACC patients. This study assessed the prognostic performance of modified S-GRAS (mS-GRAS) scores including modified grade (mG) by integrating mitotic counts into the Ki67 index (original grade), in Korean ACC patients.
Methods
Patients who underwent surgery for ACC between January 1996 and December 2022 at three medical centers in Korea were retrospectively analyzed. mS-GRAS scores were calculated based on tumor stage, mG (Ki67 index or mitotic counts), resection status, age, and symptoms. Patients were divided into four groups (0–1, 2–3, 4–5, and 6–9 points) based on total mS-GRAS score. The associations of each variable and mS-GRAS score with recurrence and survival were evaluated using Cox regression analysis, Harrell’s concordance index (C-index), and the Kaplan–Meier method.
Results
Data on mS-GRAS components were available for 114 of the 153 patients who underwent surgery for ACC. These 114 patients had recurrence and death rates of 61.4% and 48.2%, respectively. mS-GRAS score was a significantly better predictor of recurrence (C-index=0.829) and death (C-index=0.747) than each component (P<0.05), except for resection status. mS-GRAS scores correlated with shorter progression-free survival (P=8.34E-24) and overall survival (P=2.72E-13).
Conclusion
mS-GRAS scores showed better prognostic performance than tumor stage and grade in Asian patients who underwent surgery for ACC.

Citations

Citations to this article as recorded by

External validation of the S-GRAS score for predicting recurrence in patients with adrenocortical carcinoma: implications for adjuvant mitotane therapy
Paula Jimenez-Fonseca, Cristina Álvarez-Escola, Inmaculada Ballester Navarro, Jorge Hernando Cubero, Laura González Fernández, Miguel Ángel Mangas Cruz, Clara Iglesias, Jesús García-Donas, María José Picón, Miguel Paja, Lorena González Batanero, Lourdes G
European Journal of Endocrinology.2025; 193(2): 320. CrossRef

Thyroid
The Diagnostic Role of Repeated Biopsy of Thyroid Nodules with Atypia of Undetermined Significance with Architectural Atypia on Core-Needle Biopsy: Hye Hyeon Moon, Sae Rom Chung, Young Jun Choi, Tae-Yon Sung, Dong Eun Song, Tae Yong Kim, Jeong Hyun Lee, Jung Hwan Baek; Endocrinol Metab. 2024;39(2):300-309. Published online January 3, 2024; DOI: https://doi.org/10.3803/EnM.2023.1818

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Abstract PDF Supplementary Material PubReader ePub: Background
We aimed to evaluate the utility of repeat biopsy of thyroid nodules classified as atypia of undetermined significance with architectural atypia (IIIB) on core-needle biopsy (CNB).
Methods
This retrospective study evaluated patients with thyroid nodules categorized as IIIB on CNB between 2013 and 2015. Demographic characteristics, subsequent biopsy results, and ultrasound (US) images were evaluated. The malignancy rates of nodules according to number of CNBs and the number of IIIB diagnoses was compared. Demographic and US features were evaluated to determine factors predictive of malignancy.
Results
Of 1,003 IIIB nodules on CNB, the final diagnosis was determined for 328 (32.7%) nodules, with 121 of them confirmed as malignant, resulting in a malignancy rate of 36.9% (95% confidence interval, 31.7% to 42.1%). Repeat CNB was performed in 248 nodules (24.7%), with 75 (30.2%), 131 (52.8%), 13 (5.2%), 26 (10.5%), one (0.4%), and two (0.8%) reclassified into categories II, IIIB, IIIA, IV, V, and VI, respectively. Malignancy rates were not significantly affected by the number of CNBs (P=0.291) or the number of IIIB diagnoses (P=0.473). None of the nodules confirmed as category II on repeat CNB was malignant. US features significantly associated with malignancy (P<0.003) included solid composition, irregular margins, microcalcifications, and high suspicion on the US risk stratification system.
Conclusion
Repeat biopsy of nodules diagnosed with IIIB on CNB did not increase the detection of malignancy but can potentially reduce unnecessary surgery. Repeat biopsy should be performed selectively, with US features guiding the choice between repeat biopsy and diagnostic surgery.

Adrenal Gland
Outcome-Based Decision-Making Algorithm for Treating Patients with Primary Aldosteronism: Jung Hee Kim, Chang Ho Ahn, Su Jin Kim, Kyu Eun Lee, Jong Woo Kim, Hyun-Ki Yoon, Yu-Mi Lee, Tae-Yon Sung, Sang Wan Kim, Chan Soo Shin, Jung-Min Koh, Seung Hun Lee; Endocrinol Metab. 2022;37(2):369-382. Published online April 14, 2022; DOI: https://doi.org/10.3803/EnM.2022.1391

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Background
Optimal management of primary aldosteronism (PA) is crucial due to the increased risk of cardiovascular and cerebrovascular diseases. Adrenal venous sampling (AVS) is the gold standard method for determining subtype but is technically challenging and invasive. Some PA patients do not benefit clinically from surgery. We sought to develop an algorithm to improve decision- making before engaging in AVS and surgery in clinical practice.
Methods
We conducted the ongoing Korean Primary Aldosteronism Study at two tertiary centers. Study A involved PA patients with successful catheterization and a unilateral nodule on computed tomography and aimed to predict unilateral aldosterone-producing adenoma (n=367). Study B involved similar patients who underwent adrenalectomy and aimed to predict postoperative outcome (n=330). In study A, we implemented important feature selection using the least absolute shrinkage and selection operator regression.
Results
We developed a unilateral PA prediction model using logistic regression analysis: lowest serum potassium level ≤3.4 mEq/L, aldosterone-to-renin ratio ≥150, plasma aldosterone concentration ≥30 ng/mL, and body mass index <25 kg/m2 (area under the curve, 0.819; 95% confidence interval, 0.774 to 0.865; sensitivity, 97.6%; specificity, 25.5%). In study B, we identified female, hypertension duration <5 years, anti-hypertension medication <2.5 daily defined dose, and the absence of coronary artery disease as predictors of clinical success, using stepwise logistic regression models (sensitivity, 94.2%; specificity, 49.3%). We validated our algorithm in the independent validation dataset (n=53).
Conclusion
We propose this new outcome-driven diagnostic algorithm, simultaneously considering unilateral aldosterone excess and clinical surgical benefits in PA patients.

Citations

Citations to this article as recorded by

Outcomes after medical treatment for primary aldosteronism: an international consensus and analysis of treatment response in an international cohort
Jun Yang, Jacopo Burrello, Jessica Goi, Martin Reincke, Christian Adolf, Evelyn Asbach, Denise Brűdgam, Qifu Li, Ying Song, Jinbo Hu, Shumin Yang, Fumitoshi Satoh, Yoshikiyo Ono, Renata Libianto, Michael Stowasser, Nanfang Li, Qing Zhu, Namki Hong, Drishy
The Lancet Diabetes & Endocrinology.2025; 13(2): 119. CrossRef
Bridging Global and Local Perspectives on Primary Aldosteronism
Ohk-Hyun Ryu
Endocrinology and Metabolism.2025; 40(2): 195. CrossRef
Subtype-specific Body Composition and Metabolic Risk in Patients With Primary Aldosteronism
Seung Shin Park, Chang Ho Ahn, Sang Wan Kim, Ji Won Yoon, Jung Hee Kim
The Journal of Clinical Endocrinology & Metabolism.2024; 109(2): e788. CrossRef
Correlation of Histopathologic Subtypes of Primary Aldosteronism with Clinical Phenotypes and Postsurgical Outcomes
Chang Ho Ahn, You-Bin Lee, Jae Hyeon Kim, Young Lyun Oh, Jung Hee Kim, Kyeong Cheon Jung
The Journal of Clinical Endocrinology & Metabolism.2024; 109(8): e1582. CrossRef
Predicting the resolution of hypertension following adrenalectomy in primary aldosteronism: Controversies and unresolved issues a narrative review
Luigi Marzano
Langenbeck's Archives of Surgery.2024;[Epub] CrossRef
Prognostic models to predict complete resolution of hypertension after adrenalectomy in primary aldosteronism: A systematic review and meta‐analysis
Luigi Marzano, Amir Kazory, Faeq Husain‐Syed, Claudio Ronco
Clinical Endocrinology.2023; 99(1): 17. CrossRef
2023 Korean Endocrine Society Consensus Guidelines for the Diagnosis and Management of Primary Aldosteronism
Jeonghoon Ha, Jung Hwan Park, Kyoung Jin Kim, Jung Hee Kim, Kyong Yeun Jung, Jeongmin Lee, Jong Han Choi, Seung Hun Lee, Namki Hong, Jung Soo Lim, Byung Kwan Park, Jung-Han Kim, Kyeong Cheon Jung, Jooyoung Cho, Mi-kyung Kim, Choon Hee Chung
Endocrinology and Metabolism.2023; 38(6): 597. CrossRef

Clinical Study
Clinical Outcomes of N1b Papillary Thyroid Cancer Patients Treated with Two Different Doses of Radioiodine Ablation Therapy: Meihua Jin, Jonghwa Ahn, Yu-Mi Lee, Tae-Yon Sung, Won Gu Kim, Tae Yong Kim, Jin-Sook Ryu, Won Bae Kim, Young Kee Shong, Min Ji Jeon; Endocrinol Metab. 2020;35(3):602-609. Published online September 22, 2020; DOI: https://doi.org/10.3803/EnM.2020.741

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Background
The optimal dose of radioactive iodine (RAI) therapy for N1b papillary thyroid carcinoma (PTC) is controversial. We evaluated the clinical outcome of N1b PTC patients treated with either 100 or 150 mCi of RAI.
Methods
We retrospectively analyzed N1b PTC patients who underwent total thyroidectomy and postoperative RAI therapy at a tertiary referral center between 2012 and 2017. As the baseline characteristics differed between treatment groups, we performed exact matching for various pathological factors according to RAI dose. We evaluated the response to therapy and recurrence-free survival (RFS) in the matched patients. Structural recurrent/persistent disease was defined as new structural disease detected after initial therapy, which was confirmed by cytology or pathology.
Results
Of the total 436 patients, 37 (8.5%) received 100 mCi of RAI and 399 (91.5%) received 150 mCi of RAI. After an exact 1:3 matching, 34 patients in the 100 mCi group and 100 patients in the 150 mCi group remained. There was no significant difference in response to therapy between the groups in the matched population (P=0.63). An excellent response was achieved in 70.6% (n=24) of patients in the 100 mCi group and 76.0% (n=76) in the 150 mCi group. Two (5.9%) patients in the 100 mCi group and four (4.0%) in the 150 mCi group had recurrence and there was no significant difference in RFS between the groups in the matched population (P=0.351).
Conclusion
There were no differences in response to therapy and RFS in N1b PTC patients according to RAI dose.

Citations

Citations to this article as recorded by

Radioactive iodine therapy dose impact on recurrence and survival in N1 papillary thyroid cancer
Elizabeth E. Odil, Katelyn R. Ward, Ryan T. Davis, Jordan M. Reilly, Fionna Sun, Heba Elassar, Morta Lapkus, Jacquelyn Pastewski, Diane M. Studzinski, Rose E. Callahan, Peter F. Czako, Sapna Nagar
Nuclear Medicine Communications.2025; 46(2): 113. CrossRef
Efficacy of Adjuvant Radioactive Iodine Therapy in Histological Variants of DTC: A Scoping Review
Brian A. Keith, Evan S. Chernov, Shaun A. Nguyen, Jyotika K. Fernandes, William G. Albergotti
Head & Neck.2025; 47(8): 2324. CrossRef
Comparison of total thyroidectomy and lobectomy for intermediate-risk papillary thyroid carcinoma with lateral lymph node metastasis: a systematic review and meta-analysis
Xinhua Li, Zhiqiang Gui, Chun Xu, Jingzhe Xiang, Jie Ming, Tao Huang, Mingming Jiang, Hao Zhang, Zhihong Wang
International Journal of Surgery.2025; 111(9): 6343. CrossRef
Multicenter analysis of radioactive iodine therapy outcomes after total thyroidectomy for T1-T2 stage papillary thyroid carcinoma with cervical lymph node metastasis in China
Xinhua Li, Qingshu Wu, Jie Zhao, Zhiqiang Gui, Jingzhe Xiang, Jie Ming, Tao Huang, Mingming Jiang, Hao Zhang, Zhihong Wang
International Journal of Surgery.2025; 111(10): 6931. CrossRef
Controversies in the Management of Intermediate-Risk Differentiated Thyroid Cancer
David Toro-Tobon, Juan P. Brito
Endocrine Practice.2024; 30(9): 879. CrossRef
The Definition of Recurrence of Differentiated Thyroid Cancer: A Systematic Review of the Literature
Daniël J. van de Berg, Pedro M. Rodriguez Schaap, Faridi S. Jamaludin, Hanneke M. van Santen, Sarah C. Clement, Menno R. Vriens, A. S Paul van Trotsenburg, Christiaan F. Mooij, Eveline Bruinstroop, Schelto Kruijff, Robin P. Peeters, Frederik A. Verburg, R
Thyroid®.2024; 34(11): 1324. CrossRef

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