Endocrinology and Metabolism

Hyun Dae Yoon (Yoon HD)

6 Articles

Galectin-3 and Thyroid Peroxidase Expression in Thyroid Nodules.: Gyu Hwan Bae, Hyun Dae Yoon, Jong Yup Bae, Ho Sang Son, Eui Dal Jung, Sung Pyo Hong, Myung Hwan Kim, Sun Ah Lee, Hyun Sook Kim, Sun Young Ahn; J Korean Endocr Soc. 2007;22(2):105-111. Published online April 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.2.105

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BACKGROUND
The accurate diagnosis of a thyroid nodule is important in deciding a patient's treatment plan and for predicting the prognosis. The histopathological diagnosis of resected specimens are largely positively accomplished, but the consistency of the diagnosis is low when the specimen shows a small carcinomatous cytological feature or the nodule does not express papillary proliferation. Therefore, the need for supplementary diagnostic measures is increased. Herein, the expressions of galectin-3 and thyroid peroxidase (TPO) of resected specimens were investigated using immunohistochemical staining, and their potential for contributing to an accurate diagnosis studied. METHODS: The specimens included 195 resected thyroid nodules obtained from 179 patients having undergone thyroid surgery. Immunohistochemical staining for two useful antibodies, galectin-3 and TPO, were performed, and the expressions of these two antibodies investigated with regard to the histological diagnosis. RESULTS: The sensitivity, specificity, and positive and negative predictive values of galectin-3 and TPO for detecting papillary carcinomas were all 100%, but these values were low for other forms of carcinoma. CONCLUSION: Our data showed the diagnosis of thyroid nodules, using immunohistochemical staining for galectin-3 and TPO, was very useful for detecting thyroid papillary carcinoma, but insufficiently sensitive for follicular carcinoma. Immunohistochemical staining for TPO is also useful for distinguishing cases when a false positive result for galectin-3 is obtained.

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Immunohistochemical Expression of CXC Chemokine Receptor 4 and Galectin-3 in Follicular Tumors of Thyroid
Ji Eun Park, Bu Kyung Kim, Sangeon Gwoo, Yo-Han Park, Young Sik Choi, Young Ok Kim
Journal of Korean Thyroid Association.2012; 5(1): 45. CrossRef
The Significance of Immunohistochemical Staining in Thyroid Nodule: TPO and Galectin-3
G Gong
Journal of Korean Endocrine Society.2007; 22(2): 95. CrossRef

A Case of Fetal Alcohol Syndrome with Secondary Amenorrhea.: Yoon Young Cho, Hyo Jin Oh, Seok Jae Han, Sang Hun Sung, Gyu Hwan Bae, Ho Sang Shon, Hyun Dae Yoon; J Korean Endocr Soc. 2005;20(5):524-530. Published online October 1, 2005; DOI: https://doi.org/10.3803/jkes.2005.20.5.524

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Abstract PDF

Alcohol ingestion during pregnancy can be damaging to embryonic and fetal development. A specific pattern of malformation, identified as Fetal alcohol syndrome, has been documented in 1~2 of every 1,000 live infant births Fetal alcohol syndrome is characterized by growth deficiency, facial abnormalities, cardiac defects, minor joint and limb abnormalities, as well as central nervous system dysfunction, including microcephaly, mental retardation and abnormal neurobehavioral development. However, there are few reports of fetal alcohol syndrome associated with hormonal abnormality or amenorrhea. Recently, a case of secondary amenorrhea, which developed in a 19-year-old woman with fetal alcohol syndrome, was experienced at our institute, but the exact cause of the amenorrhea was difficulty to find. Herein, this case is reported, with a review of the literature.

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Alcohol Use during Pregnancy and Related Risk Factors in Korea
So Hee Lee, Seung Ju Shin, Seong-Du Won, Eun-Ju Kim, Dong-Yul Oh
Psychiatry Investigation.2010; 7(2): 86. CrossRef

The Usefulness of High Resolution Ultrasonography in the Differentiation of Thyroid Nodule.: Hyun Dae Yoon, Ho Sang Shon; J Korean Endocr Soc. 2005;20(3):242-251. Published online June 1, 2005; DOI: https://doi.org/10.3803/jkes.2005.20.3.242

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Abstract PDF

BACKGROUND
Fine needle aspiration(FNA) is regarded as the best procedure in the diagnosis of thyroid malignancies. However, the rate of false negative and indeterminate results are between 5~10 and 10~30%, respectively. Therefore, a new diagnostic tool to assist FNA is required. Recently, high resolution ultrasonography(US) has become a useful tool in the detection of malignant thyroid nodules. Therefore, the sonographic characteristics differentiating malignant from benign nodules were analyzed, and the usefulness of US in the diagnosis of thyroid malignancy assessed. METHODS: Of the 212 patients that underwent surgery due to a thyroid nodule, at the Daegu Catholic University Hospital between January 2002 and June 2004, and 181 patients(199 nodules) who underwent high resolution US examination before surgery, were included in this study. The characteristics of the sonographic parameters, such as depth/width ratio, shape, margin, structure, sponge sign, calcification and halo, and the homogeneity and echogenicity of the solid component and invasion, were observed. RESULTS: In a univariate analysis of the nonfollicular neoplasms, the depth/width ratio, shape, margin, structure, calcification and halo, and the homogeneity and echogenicity of the solid component were found to be significant parameters. The "sponge sign", a new parameter suggested by us, was found only in benign nodules. In a multiple logistic regression analysis, only the depth/width ratio, shape, presence of calcification and echogenicity of the solid component were significant parameters. According to the results of the multiple logistic regression analysis, the point and estimate of each characteristic of the significant parameters were found, and a formula for calculating a score for the prediction of malignancy computed. At a score of 0.44, the sensitivity and specificity of US were 85.9 and 88.7%, respectively. In a univariate analysis of follicular neop-lasms, the shape, calcification and echogenicity were found to be significant parameters. CONCLUSION: It was conclude that high resolution US is a very useful tool in the differentiation of benign and malignant nodules, especially in nonfollicular neoplasms. It is also suggested that the "sponge sign" might be used as a strong indicator for the confirmation of benign nodules

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Effectiveness of Suppressive Therapy with Levothyroxine in Benign Thyroid Nodules
Yun Jeong Kim, Kyung Tae, Seok Young Kang, Yong Seop Lee, Dong Sun Kim, Tae Hwa Kim, You Hern Ahn
Korean Journal of Otorhinolaryngology-Head and Neck Surgery.2009; 52(8): 674. CrossRef

A Case of Primary Aldosteronism with Aortic Dissection.: Jung Hyun Seo, Ji Young Kim, Young Sup Kim, Wan Suk Kim, Jin Hyang Shin, Dong Jik Ahn, Yoon Young Cho, Sung Hwan Park, Jae Bok Park, Hyun Dae Yoon, Ji Hyun Lee, Ho Sang Shon; J Korean Endocr Soc. 2004;19(4):452-457. Published online August 1, 2004

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Abstract PDF: Hypertension and atherosclerosis are the most important factors contributing to the development of aortic dissection. Primary aldosteronism is a rare cause of hypertension. The concurrence of aortic dissection is very rare in primary aldosteronism. However, when aortic dissection is found as a life-threatening complication of primary aldosteronism, then the diagnosis of primary aldosteronism is important because the therapeutic intervention can be curative. Only 3 cases of primary aldosteronism with aortic dissection have been reported in the literature. We report here on a case of primary aldosteronism with aortic dissection, which was treated by laparoscopic adrenalectomy. We lowered the blood pressure with antihypertensive drugs and potassium replacement was done to treat the aortic dissection. After stabilization of aortic dissection, we removed his left adrenal mass by laparoscopic adrenalectomy. Postoperatively, the patient's blood pressure has been within normal limits and the serum potassium increased to a normal level without supplementation. The aortic dissection has remained in a stable state

Association of Polymorphism in beta3-Adrenergic Receptor Gene with Fat Distribution.: Tae Sung Yun, Yong Deuk Kim, Hye Soon Kim, Mi Jung Kim, Young Sung Suh, Jung Hyeok Kwon, Jin Soo Choi, Jung Guk Kim, Sung Woo Ha, Bo Wan Kim, Kyu Chang Won, Hyong Woo Lee, Ho Sang Shon, Ji Hyun Lee, Hyun Dae Yoon, Won Ho Kim, Young Gil Yun, In Kyu Lee; J Korean Endocr Soc. 2003;18(2):184-192. Published online April 1, 2003

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Abstract PDF: BACKGROUND
Reasons for obesity include environmental factors and, more largely so, genetic factors. There have been many studies on these genetic factors. So far, genes related to obesity such as Leptin, Uncoupling Protein(UCP), Peroxisome proliferator activated receptor-gamma(PPAR-gamma), and Beta3-adrener-gic receptor(beta3-AR) gene have been discovered. Among these, beta3-AR is expressed in visceral adipose tissue and is thought to contribute to the regulation of resting metabolic rate and lipolysis. The missense mutation of beta3-AR gene, resulting in replacement of tryptophan by arginine at position 64(Trp64Arg), is associated with decreased resting metabolic rate and weightgain. We performed this study to determine if Trp64Arg polymorphism of beta3-AR gene is associatedwith obesity in Koreans. METHOD: We investigated the relationship between the beta3-AR gene mutation and body mass index (BMI), waist circumference, hip circumference, waist to hip ratio(WHR), area of subcutaneous fat, area of visceral fat, visceral to subcutaneous fat ratio(VSR), and lipid profile. 198 subjects were included in this study of which 97 were of normal weight and 101 were obese. Anthropometric data was obtained from physical examination and medical records. RESULT: In the cases of beta3-AR gene mutation of the obese group, the ratio of Trp/Arg and Arg/Arg are 43% and 5%, respectively, which were higher than the normal group(36%, 1%), although a statistical significant was not found. There was significant difference in the are of subcutaneous fat. Normal group(Trp/Trp) measured at 213.9+/-109.6cm2 versus 244.0+/-127.7cm2 (Trp/Arg) and 323.9+/-189.9cm2(Arg/Arg) for the mutation groups. Circumference of waist, circumference of hip, WHR, area of visceral fat, and VSR were higher in the mutation groups than in normal subject, but not significantly different. CONCLUSION: These results suggest that a genetic mutation in the beta3-AR gene can affect body fat composition, and is associated with obesity in Korean adults.

The Effects of Type 1 diabetes on the Metabolism and Density of Bone in Children.: Sang Jun Lee, Dong Wook Lee, Hyun Dae Yoon, Kyu Chang Won, Hyoung Woo Lee, Yoon Jung Cho, Heung Sik Kim, Seung Beom Han, In Kyu Lee, Hee Ja Lee; J Korean Endocr Soc. 2000;15(4-5):582-590. Published online January 1, 2001

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Abstract PDF: BACKGROUND
The effects of type 1 diabetes mellitus on the metabolism and density of bone in children are still controversial. The aim of this study was to evaluate the effects of type 1 diabetes on markers of bone metaboism and BMD in children by analyzing BMI, HbA1c, biochemical markers, sex hormones, bone metabolism and BMD related factors. MRTHODS: We compared 36 patients (15 males, 21 females) with type 1 diabetes mellitus to 167 healthy children (84 males, 83 females) who lived in Taegu. We measured FBS, serum calcium, phosphorus, HbA1c, osteocalcin, testosterone and estradiol for analyzing the factors which influence on bone metabolism and BMD. BMD was measured at lumbar spine, femur and total body by DEXA. RESULTS: The BMI and serum level of osteocalcin were not different in both groups. Serum calcium level was significantly lower in the diabetic group than that of control group. BMD had no difference in both groups. There was no correlation between BMD and glycemic control (HbA1c) or duration of diabetes. There was good correlation (r=0.78, p<0.01) between serum testosterone level and BMD in male patient group. There was negative correlation (r=-0.4) between serum osteocalcin level and BMD. There was significant correlation (male: r=0.76, female: r=0.66) between lean body mass and BMD in both group. CONCLUSION: The BMD was not decreased significantly and bone turn-over was normal in children with noncomplicated type 1 diabetes mellitus, and BMD was not influenced by the duration or degree of metabolic control of diabetes. But, we need further study including other risk factors that have influences on BMD and bone metabolism in type 1 diabetes mellitu.

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