Endocrinology and Metabolism

Original Article

Thyroid Big Data Articles (National Health Insurance Service Database)
Risk of Subsequent Primary Cancers in Thyroid Cancer Survivors according to the Dose of Levothyroxine: A Nationwide Cohort Study: Min-Su Kim, Jang Won Lee, Min Kyung Hyun, Young Shin Song; Endocrinol Metab. 2024;39(2):288-299. Published online March 4, 2024; DOI: https://doi.org/10.3803/EnM.2023.1815

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Background
Current research has not investigated the effect of thyroid-stimulating hormone suppression therapy with levothyroxine on the risk for developing subsequent primary cancers (SPCs). This study aimed to investigate the association between levothyroxine dosage and the risk for SPCs in thyroid cancer patients.
Methods
We conducted a nationwide population-based retrospective cohort study form Korean National Health Insurance database. This cohort included 342,920 thyroid cancer patients between 2004 and 2018. Patients were divided into the non-levothyroxine and the levothyroxine groups, the latter consisting of four dosage subgroups according to quartiles. Cox proportional hazard models were performed to evaluate the risk for SPCs by adjusting for variables including cumulative doses of radioactive iodine (RAI) therapy.
Results
A total of 17,410 SPC cases were observed over a median 7.3 years of follow-up. The high-dose levothyroxine subgroups (Q3 and Q4) had a higher risk for SPC (adjusted hazard ratio [HR], 1.14 and 1.27; 95% confidence interval [CI], 1.05–1.24 and 1.17– 1.37; respectively) compared to the non-levothyroxine group. In particular, the adjusted HR of stomach (1.31), colorectal (1.60), liver and biliary tract (1.95), and pancreatic (2.48) cancers were increased in the Q4 subgroup. We consistently observed a positive association between high levothyroxine dosage per body weight and risk of SPCs, even after adjusting for various confounding variables. Moreover, similar results were identified in the stratified analyses according to thyroidectomy type and RAI therapy, as well as in a subgroup analysis of patients with good adherence.
Conclusion
High-dose levothyroxine use was associated with increased risk of SPCs among thyroid cancer patients regardless of RAI therapy.

Citations

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The Levothyroxine Odyssey: Navigating the Path of Survivorship in Thyroid Cancer
Jin Hwa Kim
Endocrinology and Metabolism.2024; 39(2): 283. CrossRef

Special Article

Adrenal gland
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, The Committee of Clinical Practice Guideline of Korean Endocrine Society, The Korean Adrenal Study Group of Korean Endocrine Society; Endocrinol Metab. 2023;38(6):597-618. Published online October 13, 2023; DOI: https://doi.org/10.3803/EnM.2023.1789

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Primary aldosteronism (PA) is a common, yet underdiagnosed cause of secondary hypertension. It is characterized by an overproduction of aldosterone, leading to hypertension and/or hypokalemia. Despite affecting between 5.9% and 34% of patients with hypertension, PA is frequently missed due to a lack of clinical awareness and systematic screening, which can result in significant cardiovascular complications. To address this, medical societies have developed clinical practice guidelines to improve the management of hypertension and PA. The Korean Endocrine Society, drawing on a wealth of research, has formulated new guidelines for PA. A task force has been established to prepare PA guidelines, which encompass epidemiology, pathophysiology, clinical presentation, diagnosis, treatment, and follow-up care. The Korean clinical guidelines for PA aim to deliver an evidence-based protocol for PA diagnosis, treatment, and patient monitoring. These guidelines are anticipated to ease the burden of this potentially curable condition.

Citations

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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.2023;[Epub] CrossRef

Review Article

Calcium & Bone Metabolism
Update on Preoperative Parathyroid Localization in Primary Hyperparathyroidism: Hye-Sun Park, Namki Hong, Jong Ju Jeong, Mijin Yun, Yumie Rhee; Endocrinol Metab. 2022;37(5):744-755. Published online October 25, 2022; DOI: https://doi.org/10.3803/EnM.2022.1589

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Parathyroidectomy is the treatment of choice for primary hyperparathyroidism when the clinical criteria are met. Although bilateral neck exploration is traditionally the standard method for surgery, minimally invasive parathyroidectomy (MIP), or focused parathyroidectomy, has been widely accepted with comparable curative outcomes. For successful MIP, accurate preoperative localization of parathyroid lesions is essential. However, no consensus exists on the optimal approach for localization. Currently, ultrasonography and technetium-99m-sestamibi–single photon emission computed tomography/computed tomography are widely accepted in most cases. However, exact localization cannot always be achieved, especially in cases with multiglandular disease, ectopic glands, recurrent disease, and normocalcemic primary hyperparathyroidism. Therefore, new modalities for preoperative localization have been developed and evaluated. Positron emission tomography/computed tomography and parathyroid venous sampling have demonstrated improvements in sensitivity and accuracy. Both anatomical and functional information can be obtained by combining these methods. As each approach has its advantages and disadvantages, the localization study should be deliberately chosen based on each patient’s clinical profile, costs, radiation exposure, and the availability of experienced experts. In this review, we summarize various methods for the localization of hyperfunctioning parathyroid tissues in primary hyperparathyroidism.

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Expression of the Calcium-Sensing Receptor on Normal and Abnormal Parathyroid and Thyroid Tissue
Anne L. Worth, Mesrop Ayrapetyan, Susan J. Maygarden, Zibo Li, Zhanhong Wu, Chris B. Agala, Lawrence T. Kim
Journal of Surgical Research.2024; 293: 618. CrossRef
Use of [18F]fluorocholine PET/CT in the detection of primary hyperparathyroidism in paediatrics: a case report
Helena Martínez Sánchez, Francisca Moreno Macián, Sara León Cariñena, Carmen de Mingo Alemany, Lidia Blasco González, Raquel Sánchez Vañó
Journal of Pediatric Endocrinology and Metabolism.2024;[Epub] CrossRef
A Rare Case of Hyperfunctioning Lipoadenoma Presenting as a Cystic Pararthyroid Lesion
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Journal of Bone Metabolism.2023; 30(2): 201. CrossRef
Role of 18F-Fluorocholine Positron Emission Tomography (PET)/Computed Tomography (CT) in Diagnosis of Elusive Parathyroid Adenoma
Janan R Badier, Pokhraj P Suthar, Jagadeesh S Singh, Miral D Jhaveri
Cureus.2023;[Epub] CrossRef
Pitfalls of DualTracer 99m-Technetium (Tc) Pertechnetate and Sestamibi Scintigraphy before Parathyroidectomy: Between Primary-Hyperparathyroidism-Associated Parathyroid Tumour and Ectopic Thyroid Tissue
Mara Carsote, Mihaela Stanciu, Florina Ligia Popa, Oana-Claudia Sima, Eugenia Petrova, Anca-Pati Cucu, Claudiu Nistor
Medicina.2023; 60(1): 15. CrossRef
Diagnostic Performance of Magnetic Resonance Imaging for Parathyroid Localization of Primary Hyperparathyroidism: A Systematic Review
Max H. M. C. Scheepers, Zaid Al-Difaie, Lloyd Brandts, Andrea Peeters, Bjorn Winkens, Mahdi Al-Taher, Sanne M. E. Engelen, Tim Lubbers, Bas Havekes, Nicole D. Bouvy, Alida A. Postma
Diagnostics.2023; 14(1): 25. CrossRef

Original Articles

Adrenal Gland
Metabolic Subtyping of Adrenal Tumors: Prospective Multi-Center Cohort Study in Korea: Eu Jeong Ku, Chaelin Lee, Jaeyoon Shim, Sihoon Lee, Kyoung-Ah Kim, Sang Wan Kim, Yumie Rhee, Hyo-Jeong Kim, Jung Soo Lim, Choon Hee Chung, Sung Wan Chun, Soon-Jib Yoo, Ohk-Hyun Ryu, Ho Chan Cho, A Ram Hong, Chang Ho Ahn, Jung Hee Kim, Man Ho Choi; Endocrinol Metab. 2021;36(5):1131-1141. Published online October 21, 2021; DOI: https://doi.org/10.3803/EnM.2021.1149

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Background
Conventional diagnostic approaches for adrenal tumors require multi-step processes, including imaging studies and dynamic hormone tests. Therefore, this study aimed to discriminate adrenal tumors from a single blood sample based on the combination of liquid chromatography-mass spectrometry (LC-MS) and machine learning algorithms in serum profiling of adrenal steroids.
Methods
The LC-MS-based steroid profiling was applied to serum samples obtained from patients with nonfunctioning adenoma (NFA, n=73), Cushing’s syndrome (CS, n=30), and primary aldosteronism (PA, n=40) in a prospective multicenter study of adrenal disease. The decision tree (DT), random forest (RF), and extreme gradient boost (XGBoost) were performed to categorize the subtypes of adrenal tumors.
Results
The CS group showed higher serum levels of 11-deoxycortisol than the NFA group, and increased levels of tetrahydrocortisone (THE), 20α-dihydrocortisol, and 6β-hydroxycortisol were found in the PA group. However, the CS group showed lower levels of dehydroepiandrosterone (DHEA) and its sulfate derivative (DHEA-S) than both the NFA and PA groups. Patients with PA expressed higher serum 18-hydroxycortisol and DHEA but lower THE than NFA patients. The balanced accuracies of DT, RF, and XGBoost for classifying each type were 78%, 96%, and 97%, respectively. In receiver operating characteristics (ROC) analysis for CS, XGBoost, and RF showed a significantly greater diagnostic power than the DT. However, in ROC analysis for PA, only RF exhibited better diagnostic performance than DT.
Conclusion
The combination of LC-MS-based steroid profiling with machine learning algorithms could be a promising one-step diagnostic approach for the classification of adrenal tumor subtypes.

Citations

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Treating Primary Aldosteronism-Induced Hypertension: Novel Approaches and Future Outlooks
Nathan Mullen, James Curneen, Padraig T Donlon, Punit Prakash, Irina Bancos, Mark Gurnell, Michael C Dennedy
Endocrine Reviews.2024; 45(1): 125. CrossRef
Steroid profiling in adrenal disease
Danni Mu, Dandan Sun, Xia Qian, Xiaoli Ma, Ling Qiu, Xinqi Cheng, Songlin Yu
Clinica Chimica Acta.2024; 553: 117749. CrossRef
Plasma steroid profiling combined with machine learning for the differential diagnosis in mild autonomous cortisol secretion from nonfunctioning adenoma in patients with adrenal incidentalomas
Danni Mu, Xia Qian, Yichen Ma, Xi Wang, Yumeng Gao, Xiaoli Ma, Shaowei Xie, Lian Hou, Qi Zhang, Fang Zhao, Liangyu Xia, Liling Lin, Ling Qiu, Jie Wu, Songlin Yu, Xinqi Cheng
Endocrine Practice.2024;[Epub] CrossRef
Mild autonomous cortisol secretion: pathophysiology, comorbidities and management approaches
Alessandro Prete, Irina Bancos
Nature Reviews Endocrinology.2024;[Epub] CrossRef
Serum and hair steroid profiles in patients with nonfunctioning pituitary adenoma undergoing surgery: A prospective observational study
Seung Shin Park, Yong Hwy Kim, Ho Kang, Chang Ho Ahn, Dong Jun Byun, Man Ho Choi, Jung Hee Kim
The Journal of Steroid Biochemistry and Molecular Biology.2023; 230: 106276. CrossRef
Recent Updates on the Management of Adrenal Incidentalomas
Seung Shin Park, Jung Hee Kim
Endocrinology and Metabolism.2023; 38(4): 373. CrossRef
LC-MS based simultaneous profiling of adrenal hormones of steroids, catecholamines, and metanephrines
Jongsung Noh, Chaelin Lee, Jung Hee Kim, Seung Woon Myung, Man Ho Choi
Journal of Lipid Research.2023; 64(11): 100453. 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
Toward Systems-Level Metabolic Analysis in Endocrine Disorders and Cancer
Aliya Lakhani, Da Hyun Kang, Yea Eun Kang, Junyoung O. Park
Endocrinology and Metabolism.2023; 38(6): 619. CrossRef
Prevalence and Characteristics of Adrenal Tumors in an Unselected Screening Population
Ying Jing, Jinbo Hu, Rong Luo, Yun Mao, Zhixiao Luo, Mingjun Zhang, Jun Yang, Ying Song, Zhengping Feng, Zhihong Wang, Qingfeng Cheng, Linqiang Ma, Yi Yang, Li Zhong, Zhipeng Du, Yue Wang, Ting Luo, Wenwen He, Yue Sun, Fajin Lv, Qifu Li, Shumin Yang
Annals of Internal Medicine.2022; 175(10): 1383. CrossRef

Clinical Study
Radioactive Parathyroid Adenomas on Sestamibi Scans: Low Parathyroid Hormone Secretory Potential and Large Volume: Sung Hye Kong, Jung Hee Kim, Sang Wan Kim, Chan Soo Shin; Endocrinol Metab. 2021;36(2):351-358. Published online April 6, 2021; DOI: https://doi.org/10.3803/EnM.2020.823

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Background
We investigated the clinical characteristics of parathyroid adenomas according to radioactivity on ^99mTc-methoxyisobutylisonitrile (^99mTc-MIBI) single-photon emission computed tomography/computed tomography (SPECT/CT) in primary hyperparathyroidism (PHPT) patients.
Methods
The study included 217 patients diagnosed with PHPT from 2000 to 2019 at Seoul National University Hospital who underwent ^99mTc-MIBI SPECT/CT scans. On SPECT/CT, the radioactivity of parathyroid adenomas was measured as the ratio of the mean radioactivity count of the parathyroid adenoma to that of the contralateral thyroid.
Results
Tumors were localized by MIBI scans in 190 patients (MIBI [+] group) and by ultrasound or parathyroid four-dimensional CT in 27 patients (MIBI [–] group). The mean age was 55 years, and mean body mass index was 23.4 kg/m². Patients in the MIBI (+) group had higher parathyroid hormone (iPTH) and lower 25-hydroxy vitamin D levels than those in the MIBI (–) group (168.0 pg/mL [interquartile range, IQR, 111.0 to 250.7] vs. 134.7 pg/mL [IQR, 98.2 to 191.2], P=0.049; 15.4 ng/mL [IQR, 11.1 to 20.8] vs. 21.2 ng/mL [IQR, 13.9 to 24.8], P=0.012, respectively). Patients in the MIBI (+) group had larger tumor volumes, but lower iPTH/volume ratios than those in the MIBI (–) group (1,216.66 [IQR, 513.40 to 2,663.02], 499.82 mm³ [IQR, 167.77 to 1,229.80], P=0.002; 0.18 [IQR, 0.08 to 0.46], 0.40 pg/mL/mm³ [IQR, 0.16 to 1.29], P=0.016, respectively). Adenoma radioactivity was positively correlated with calcium, iPTH, and volume (r=0.180, P=0.020; r=0.208, P=0.006; r=0.288, P<0.001, respectively), but not with iPTH/volume.
Conclusion
Parathyroid adenomas with positive MIBI scans had larger volumes and higher iPTH than adenomas with negative scans, but lower iPTH per unit volume.

Citations

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Protein Signatures of Parathyroid Adenoma according to Tumor Volume and Functionality
Sung Hye Kong, Jeong Mo Bae, Jung Hee Kim, Sang Wan Kim, Dohyun Han, Chan Soo Shin
Endocrinology and Metabolism.2024; 39(2): 375. CrossRef
Atypical parathyroid tumor: clinical and parathyroid hormone response to surgical treatment
Antonio Giulio Napolitano, Massimo Monacelli, Valeria Liparulo, Eleonora Coviello, Domenico Pourmolkara, Stefano Avenia, Andrea Polistena
Annals of Surgical Treatment and Research.2023; 105(2): 76. CrossRef
The Relationship between Planar and SPECT/CT Parameters and Functional Markers in Primary Hyperparathyroidism
Guler Silov, Serpil Erdogan Ozbodur
Diagnostics.2023; 13(20): 3182. CrossRef

Clinical Study
Association of Hyperparathyroidism and Papillary Thyroid Cancer: A Multicenter Retrospective Study: Chaiho Jeong, Hye In Kwon, Hansang Baek, Hun-Sung Kim, Dong-Jun Lim, Ki-Hyun Baek, Jeonghoon Ha, Moo Il Kang; Endocrinol Metab. 2020;35(4):925-932. Published online December 10, 2020; DOI: https://doi.org/10.3803/EnM.2020.725

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Background
Concomitant papillary thyroid cancer (PTC) and hyperparathyroidism (HPT) have been reported in several studies. Our study aimed to investigate the incidence of concomitant PTC in HPT patients upon preoperative diagnosis and present a clinical opinion on detecting thyroid malignancy in case of parathyroidectomy.
Methods
Patients who underwent parathyroidectomy between January 2009 and December 2019 in two medical centers were included. Of the 279 participants 154 were diagnosed as primary hyperparathyroidism (pHPT) and 125 as secondary hyperparathyroidism (sHPT). The incidence of concomitant PTC and its clinical characteristics were compared with 98 patients who underwent thyroidectomy and were diagnosed with classical PTC during the same period.
Results
Concurrent PTC was detected in 14 patients (9.1%) with pHPT and in nine patients (7.2%) with sHPT. Ten (71.4%) and seven (77.8%) PTCs were microcarcinomas in the pHPT and sHPT cases respectively. In the pHPT patients, vitamin D was lower in the pHPT+PTC group (13.0±3.7 ng/mL) than in the pHPT-only group (18.5±10.4 ng/mL; P=0.01). Vitamin D levels were also lower in the sHPT+PTC group (12.3±5.6 ng/mL) than in the sHPT-only group (18.0±10.2 ng/mL; P=0.12). In the concomitant PTC group, lymph node ratio was higher than in the classical PTC group (P=0.00).
Conclusion
A high prevalence of concomitant PTC was seen in patients with pHPT and sHPT. Those concomitant PTCs were mostly microcarcinomas and had more aggressive features, suggesting that efforts should be made to detect concomitant malignancies in the preoperative parathyroidectomy evaluation.

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The unexpected effect of parathyroid adenoma on inflammation
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Evaluation of Nodular Goiter and Papillary Thyroid Cancer Coincidence in Patients with Primary Hyperparathyroidism
Mustafa ÇALIŞKAN, Hasret CENGİZ, Taner DEMİRCİ
Düzce Tıp Fakültesi Dergisi.2023; 25(2): 200. CrossRef
Papillary thyroid carcinoma coexisting with benign thyroid and parathyroid pathology: clinical and pathomorphological features
A. Dinets, M. Gorobeiko, V. Hoperia, A. Lovin, S. Tarasenko
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The Nexus of Hyperparathyroidism and Thyroid Carcinoma: Insights into Pathogenesis and Diagnostic Challenges—A Narrative Review
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Rongzhi Wang, Peter Abraham, Brenessa Lindeman, Herbert Chen, Jessica Fazendin
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Papillary thyroid carcinoma prevalence and its predictors in patients with primary hyperparathyroidism
Elif Tutku DURMUŞ, Ayşegül ATMACA, Mehmet KEFELİ, Ramis ÇOLAK, Buğra DURMUŞ, Cafer POLAT
Journal of Health Sciences and Medicine.2022; 5(5): 1499. CrossRef
Association of Hyperparathyroidism and Papillary Thyroid Cancer: A Multicenter Retrospective Study (Endocrinol Metab 2020;35:925-32, Chaiho Jeong et al.)
Chaiho Jeong, Jeonghoon Ha, Moo Il Kang
Endocrinology and Metabolism.2021; 36(1): 205. CrossRef
Association of Hyperparathyroidism and Papillary Thyroid Cancer: A Multicenter Retrospective Study (Endocrinol Metab 2020;35:925-32, Chaiho Jeong et al.)
Burcu Candemir, Coşkun Meriç
Endocrinology and Metabolism.2021; 36(1): 203. CrossRef

Review Article

Miscellaneous
Intraoperative Parathyroid Hormone Monitoring in the Surgical Management of Sporadic Primary Hyperparathyroidism: Zahra F. Khan, John I. Lew; Endocrinol Metab. 2019;34(4):327-339. Published online December 23, 2019; DOI: https://doi.org/10.3803/EnM.2019.34.4.327

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Intraoperative parathyroid hormone monitoring (IPM) has been shown to be a useful adjunct during parathyroidectomy to ensure operative success at many specialized medical centers worldwide. Using the Miami or “>50% intraoperative PTH drop” criterion, IPM confirms the complete excision of all hyperfunctioning parathyroid tissue before the operation is finished, and helps guide the surgeon to identify additional hyperfunctioning parathyroid glands that may necessitate further extensive neck exploration when intraoperative parathyroid hormone (PTH) levels do not drop sufficiently. The intraoperative PTH assay is also used to differentiate parathyroid from non-parathyroid tissues during operations using fine needle aspiration samples and to lateralize the side of the neck harboring the hypersecreting parathyroid through differential jugular venous sampling when preoperative localization studies are negative or equivocal. The use of IPM underscores the recognition and understanding of sporadic primary hyperparathyroidism (SPHPT) as a disease of function rather than form, where the surgeon is better equipped to treat such patients with quantitative instead of qualitative information for durable long-term operative success. There has been a significant paradigm shift over the last 2 decades from conventional to focused parathyroidectomy guided by IPM. This approach has proven to be a safe and rapid operation requiring minimal dissection performed in an ambulatory setting for the treatment of SPHPT.

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Intraoperative parathyroid hormone monitoring in parathyroidectomy for hyperparathyroidism: a protocol for a network meta-analysis of diagnostic test accuracy
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A >50% Intraoperative Parathyroid Hormone Decrease Into Normal Reference Range Predicts Complete Excision of Malignancy in Patients With Parathyroid Carcinoma
Valerie L. Armstrong, Tanaz M. Vaghaiwalla, Cima Saghira, Cheng-Bang Chen, Yujie Wang, Johan Anantharaj, Mehmet Ackin, John I. Lew
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Sophie Dream, Tina W. F. Yen, Kara Doffek, Douglas B. Evans, Tracy S. Wang
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Neuroimaging Clinics of North America.2021; 31(3): 397. CrossRef
Focused parathyroidectomy without intraoperative parathyroid hormone measurement in primary hyperparathyroidism: Still a valid approach?
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Surgery.2021; 170(6): 1860. CrossRef
Response to the Comment on “Risk Factors of Redo Surgery After Unilateral Focused Parathyroidectomy – Conclusions From a Comprehensive Nationwide Database of 13,247 Interventions Over 6 Years”
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Case Reports

A Case of Giant Adrenal Adenoma Presenting Primary Aldosteronism.: Ji Hyun Lee, Bong Soo Cha, Moon Suk Nam, Young Duk Song, Sung Kil Lim, Hyun Chul Lee, Kap Bum Huh, Hyung Chan Suh, Young Hwa Choi, Jae Min Park, Jung Soo Park, Soon Won Hong, Dong Hwan Shin; J Korean Endocr Soc. 1996;11(3):348-354. Published online November 7, 2019

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Abstract PDF: Primary aldosteronism is a syndrome chracterized by hypokalemic alkalosis and hypertension. Small sized adrenal cortical adenomas have been the major cause of this syndrome in most of the patients. However, if the adrenal mass is larger than 6cm in diameter and with irregular consistency, malignancy is more favored. We experienced a patient who had a giant adrenal adenoma with primary aldosteronism. A 24-year-old female presented with hypertension, hypokalemia, low plasma renin, and high plasrna aldosterone levels, was found to have a 6×5.5×5 cm sized left adrenal tumor by MRI. Her clinical laboratory feature did not revealed any evidence of Cushing's syndrome or pheochromocytoma. Preoperatively adrenal carcinoma presenting pure adrenal aldosteronism was suspected due to large size and heterogenous signal character of the adrenal mass in radiologic study. At operation well encapsulated, round giant adrenal tumor weighing 65gm(4.5×4×4 cm) was removed. There was no evidence of metastasis with return of adrenal function to normal after surgery. Benign adrenal adenoma was confirmed by the gross morphology and the histologic features.

A Case of Mediastinal parathyroid adenoma localized by technetium-99m sestamibi scanning.: Bong Yun Cha, Kwang Woo Lee, Ho Young Son, Sung Koo Kang, Ki Ho Song, Sung Hee Lee, Won Hee Han, Hyung Sun Sohn; J Korean Endocr Soc. 1996;11(2):227-232. Published online November 7, 2019

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Abstract PDF: We present a patient with primary hyperparathyroidism in whom preoperative Tc-99m sestarnibi scanning cleary demonstrated mediastinal parathyroid adenoma. After resectian of tumor through median sternotomy, he was restored to the normocalcemia. This case suggests that Tc-99m sestamibi scanning may be a useful method in the preoperative localization of mediastinal parathyroid adenoma.

A Case of Primary Thyroid Lymphoma Involving Bone Marrow (Stage IVE) Assoeiated with Hashimoto's Thyroiditis.: Young Kee Shong, Joong Yeol Park, Ghi Su Kim, Jae Kun Cho, Yun Ho Chu, Wan Sik Eom, Sang Hee Kim, Hyun Sook Chi, Gyung Yub Gong, Ki Up Lee; J Korean Endocr Soc. 1994;9(4):390-394. Published online November 6, 2019

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Abstract PDF: Primary lymphoma of the thyroid is a relatively rare malignant tumor of the thyroid. It is known to be frequently associated with Hashimoto's thyroiditis. In Korea, a few cases of primary lymphoma of the thyroid have been reported and most of these cases were in the stage I E or II E. Recently, we experienced a case of the primary thyroid lymphoma, stage IV E associated with Hashimoto's thyroiditis in a 70-year-old woman who presented with dysphagia and dyspnea due to rapidly enlarging neck mass.She was treated with combination chemotherapy(cyclophosphamide, adriamycin, vincristine and methylprednisolone) and local radiotherapy and achieved partial response with resolution of dysphagia and dyspnea.

Original Article

Changes in Thyrotropin Receptor Blocking Antibody after Antithyroid drug Administration to Patients with Atrophic Autoimmune Thyroiditis (Primary Myxedema).: Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee, Jae Hoon Chung, Chang Soon Koh, Chan Soo Shin, Won Bae Kim; J Korean Endocr Soc. 1994;10(3):229-241. Published online November 6, 2019

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Abstract PDF: It is well Known that antithyroid drug treatment of Graves' disease suppresses excessive thyroid hormone synthesis and causes a parallel decrease in serum thyroid autoantibody levels including thyroid stimulating antibodies(TSAb) in most patients suggesting the immunosuppressive or immunomodulating effects of antithyroid drugs. In the context of view that thyrotropin receptor blocking antibody may play an important pathogenetic role at least in some patients with primary myxedema(chronic atrophic autoimmune thyroiditis), antithyroid drug treatment in these patients might be beneficial to disease course. To evaluate the effect of antithyroid drug on the thyrotropin receptor blocking antibody levels, we serially measured thyrotropin-binding inhibitor immunoglobulins(TBII) and thyroid stimulation blocking antibodies(TSBAb) using FRTL-5 cells, antimicrosomal- and antithyroglobulin antibody activities in 7 patients with primary myedema who have blocking TSH receptor antibodies during 6 months of methimazole(MMI, 40mg/day) administration. TBII and TSBAb activities did not change after MMI, but one of them showed stepwise decrease and disappearance of TBII and TSBAb activities. Antimicrosomal- and antithyroglobulin antibody activities decreased significantly after 3 months of MMI administration in those patients. These results suggest a minimal effect of antithyroid drug treatment on the level of thyrotropin receptor blocking antibodies. Persistence of thyrotropin receptor blocking antibodies despite of the decrease in antimicrosomal and antithyroglobulin antibodies might suggest that blocking TSH receptor antibodies of primary myxedema is produced mainly in extrathyroidal tissue in contrast to the thyroid stimulating antibodies of Graves' disease. One patient, whose blocking antibody have disappeared after MMI treatment, is under observation to see if she will remain in remission of hypothyroidism.

Case Reports

Primary Hyperparathyroidism in Children.: Han Sang Cho, Sang Ook Park, Byung Mun Lee, Yung Tak Lim, Su Yung Kim; J Korean Endocr Soc. 1994;9(3):251-257. Published online November 6, 2019

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Abstract PDF: Primary hyperparathyroidism is a rare endocrine disease in children. It involves bone and joint, urinary tract, gastrointestinal tract and cardiovascular system. The main cause of these involvement is high level of PTH in serum, resulting in hypercalcemia.An 11 years old male patient who had complained of limping gait since last 18 months, showed typical laboratory and radiological findings of primary hyperparathyroidism. At the ultrasonography, computed tomography and radionuclide scanning, a well defined mass(10 X 15mm) was found on the posterior aspect of the right thyroid lobe. The mass was confirmed histologically as adenoma of parathyroid gland. The patient was successfully treated with subtotal parathyroidectomy and temporal administration of calcium and vitamin D.We report this case of primary hyperparathyroidism with brief review of the literatures.

A Case of Primary Hyperparathyroidism Associated with Proximal Renal Tubular Acidosis and Postoperative Hungry Bone Syndrome.: Je Ho Han, Kun Ho Yoon, Bong Yun Cha, Ho Young Son, Kwang Woo Lee, Hae Ok Jung, Chang Sup Kim, Moo Il Kang, Chul Soo Cho, Ho Yun Kim, Sung Koo Kang; J Korean Endocr Soc. 1994;9(2):141-149. Published online November 6, 2019

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Abstract PDF: Primary hyperparathyroidism is a generalezed disorder of calcium, phosphorus and bone metabolism due to an increased secretion of parathyroid hormone. Single parathyroid adenoma is the most common cause of primary hyperparathyroidism. Because parathyroid hormone has been proposed as an important inhibitor of renal bicarbonate reabsorption of proximal tubule, proximal renal tubular acidosis is not rare in primary hyperparaphyroidism. After parathyroid resection, significant hypocalcemia and hypophosphatemia requiring prolonged medical management may develop, termed hungery bone syndrome. We experienced a case of primary hyperparathyroidism associated with proximal renal tubular acidosis, and severe hungry bone syndrome after resection of the adenoma of parathyroid gland.

Evaluation of Glucone Tolerance and Insulin Secretion in Two Patients with Primary Hyperparathyroidism Before and After Surgery.: Sung Hee Ihm, Moon Gi Choi, Hyung Joon Yoo, Sang Hyun Chun, Yong Seok Choi, Gun Yong Lee, In Seo Lim, Sung Woo Park; J Korean Endocr Soc. 1994;9(1):54-58. Published online November 6, 2019

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Abstract PDF: It is reported that patients with primary hyperparathyroidism(PHPT) have disturbances in carbohydrate metabolism: in particular, hyperinsulinemia and insulin resistance are characteristic early metabolic aberrations of this disease. However, it is not clear whether changes of insulin secretion or insulin sensitivity are observed in all patients with PHPT, including those with normal glucose tolerance. Also, it is not clear whether these changes are reversible after surgical correction of PHPT. In the present study, glucose tolerance and insulin secretion were evaluated in 2 symptomatic patients with PHPT during 100g oral glucose tolerance test before and after parathyroid adenoma removal. Comparing these patients before and after surgery, glucose tolerance was not significantly different. However, C-peptide and insulin secretion was low after surgical correction of PHPT compared to the preoperative situation. This observation suggests that insulin hypersecretion in patients with PHPT precedes glucose intolerance and this early disturbance is reversible after surgery.

Original Article

Clinical Study
Current Management of Type 2 Diabetes Mellitus in Primary Care Clinics in Korea: Da Hea Seo, Shinae Kang, Yong-ho Lee, Jung Yoon Ha, Jong Suk Park, Byoung-Wan Lee, Eun Seok Kang, Chul Woo Ahn, Bong-Soo Cha; Endocrinol Metab. 2019;34(3):282-290. Published online September 26, 2019; DOI: https://doi.org/10.3803/EnM.2019.34.3.282

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15 Web of Science
15 Crossref

Abstract PDF Supplementary Material PubReader ePub

Background

This study investigated the overall status of diabetes control and screening for diabetic microvascular complications in patients with type 2 diabetes mellitus attending primary care clinics in Korea.

Methods

In this cross-sectional observational study, 191 primary care clinics were randomly selected across Korea from 2015 to 2016. In total, 3,227 subjects were enrolled in the study.

Results

The patients followed at the primary care clinics were relatively young, with a mean age of 61.4±11.7 years, and had a relatively short duration of diabetes (mean duration, 7.6±6.5 years). Approximately 14% of subjects had diabetic microvascular complications. However, the patients treated at the primary care clinics had suboptimal control of hemoglobin A1c levels, blood pressure, and serum lipid levels, along with a metabolic target achievement rate of 5.9% according to the Korean Diabetes Association guidelines. The screening rates for diabetic nephropathy, retinopathy, and neuropathy within the past 12 months were 28.4%, 23.3%, and 13.3%, respectively.

Conclusion

The overall status of diabetes management, including the frequency of screening for microvascular complications, was suboptimal in the primary care clinics. More efforts should be made and more resources need to be allocated for primary care physicians to promote adequate healthcare delivery, which would result in stricter diabetes control and improved management of diabetic complications.

Citations

Citations to this article as recorded by

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