Endocrinology and Metabolism

Yong Wook Cho (Cho YW)

11 Articles

A Case of Inappropriate Antidiuretic Hormone Syndrome Complicated with Tuberculous Meningitis Refractory to Antituberculosis Drugs.: Ju Hee Oh, Sang Pil Yun, So Young Lee, Yeo Kyung Lee, Young Sun Jung, Soo Kyung Kim, Sung Kwan Hong, Seok Won Park, Yong Wook Cho; J Korean Endocr Soc. 2007;22(3):210-214. Published online June 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.3.210

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Abstract PDF: Syndrome of inappropriate antidiuretic hormone is the most common cause of hyponatremia in hospitalized patients. It is defined as retention of water, loss of sodium and inappropriately concentrated urine in euvolemic patients with normal renal and adrenal function. A 26-year old male was admitted due to weight loss and fever that he had experienced for the previous 1 month. The chest X-ray and CT scan of lung showed about 2.5x1.2 cm lymph node enlargement at the left hilum and multiple lymph node enlargements. Thoracoscopic biopsy revealed tuberculosis. During treatment with antituberculosis drugs, the serum sodium was 125 mEq/L, the serum osmolality was 263 mOsm/kg, the urine osmolality was 577 mOsm/kg, and the urine sodium concentration was 177 mEq/L. He was treated by fluid restriction and hypertonic saline infusion, but he did not improve. Brain CT scan showed tuberculous meningitis with hydrocephalus. He fully recovered after undergoing ventriculoperitoneal shunt. We report here on a case of inappropriate antidiuretic hormone syndrome complicated by tuberculous meningitis that was refractory to antituberculosis drugs.

Clinical Implication of Serum TSH Concentration.: Yong Wook Cho; J Korean Endocr Soc. 2007;22(2):87-94. Published online April 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.2.87

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Investigation of single nucleotide polymorphism in TSH-β and CaSR associated with body weight in Korean native chickens (Gray Brown)
Dongyep Oh, Jae Jung Ha, Jun Koo Yi, Dae Hyun Kim, Seung Min Oh, Songmi Kim, Kyudong Han, Yong-Soo Park
Journal of Animal Reproduction and Biotechnology.2021; 36(3): 129. CrossRef
The association of Osteoporosis and Thyroid Hormone in euthyroid adults
Hyun Yoon, Eun-Jin Ryu
Journal of the Korea Academia-Industrial cooperation Society.2015; 16(2): 1137. CrossRef
The Change of Thyroid Stimulating Hormone Values of Healthy Subjects According to Temperature and Aging
Sung Su Kim, Dong Hoon Lew, Ja Yoon Choi, Eun Ju Lee, Min Gyo Kim, Kyong Young Kim, Soo Kyoung Kim, Jung Hwa Jung, Jae Hoon Jung, Jong Ryeal Hahm
Kosin Medical Journal.2014; 29(2): 125. CrossRef

Comparison of Common Carotid Artery Intima-Media Thickness between Subclinical Hypothyroidism and Euthyroidism.: Kyung Sun Park, Jung Im Rue, Soo Kyung Kim, In Jae Kim, Sang Wook Lim, Seok Won Park, Yu Lee Kim, Dong Hoon Cha, Yong Wook Cho, Young Kil Choi, Sang Jong Lee; J Korean Endocr Soc. 2006;21(6):490-496. Published online December 1, 2006; DOI: https://doi.org/10.3803/jkes.2006.21.6.490

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BACKGROUND
Common carotid artery intima-media thickness (IMT), which is increased in patients with overt hypothyroidism, is an independent risk factor of the atherosclerosis-related disease. This study was performed to compare serum lipid level and common carotid artery IMT among patients with overt hypothyroidism, subclinical hypothyroidism and euthyroidism. METHODS: Patients with newly-diagnosed subclinical (n=32) and overt (n=32) hypothyroidism were selected for this study. All of the patients and an age- and sex-matched euthyroidism cohort were checked for clinical characteristics and serum lipid levels. Common carotid artery IMT was also measured using high resolution B-mode ultrasonography. RESULTS: Statistically significant differences were observed between the total cholesterol levels of patients with subclinical hypothyroidism and those with euthyroidism. When common carotid artery IMT measured by ultrasonography, subclinical (0.67 +/- 0.11 mm) and overt (0.71 +/- 0.12 mm)) hypothyroidism showed significantly increased mean IMT compared to that of euthyroidism (0.58 +/- 0.07 mm, P < 0.05, respectively), but no differences were found between subclinical and overt hypothyroidism. CONCLUSION: We concluded that subclinical hypothyroidism is related to increased common carotid artery IMT as well as dyslipidemia. Therefore, we recommend that treatment principle of subclinical hypothyroidism be established through large-scale, prospective studies performed to determine the effect of thyroid hormone replacement on the reduction of common carotid artery IMT.

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The Effect of Brief Thyroid Functional Changes on Arterial Stiffness in Patients Who Preparing Radioactive Iodine Administration
Ho-Su Kim, Jae-Hoon Jung, Jung Hwa Jung, Soo Kyoung Kim, Sungsu Kim, Jeong Rang Park, Rock Bum Kim, Jong Ryeal Hahm
International Journal of Thyroidology.2015; 8(2): 161. CrossRef
Changes of Body Composition, Blood Concentrations of Lipid Profiles and Thyroid Hormone After Exercise Training in Hypothyroid-induced Rat
Kijin Kim
The Korean Journal of Obesity.2012; 21(1): 65. CrossRef

A Case of Non-islet Cell Tumor Hypoglycemia.: Yun Tae Chae, Il Jun Hwang, Kyung Hee Ryu, Eun Hyang Ko, Jung Im Rue, Soo Kyung Kim, Seok Won Park, Yoo Ri Kim, Yong Wook Cho, Young Kil Choi, Sang Jong Lee; J Korean Endocr Soc. 2006;21(1):74-78. Published online February 1, 2006; DOI: https://doi.org/10.3803/jkes.2006.21.1.74

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Mesenchymal tumors including hemangiopericytomas, hepatocellular tumors, adrenal carcinomas, and a variety of other large tumors have been reported to produce excessive amounts of insulin-like growth factor (IGF) type II precursor, which binds weakly to insulin receptors and strongly to IGF-I receptors, leading to insulin like actions. In addition to increased IGF-II production, IGF-II bioavailability is increased due to complex alterations in circulating binding proteins. The authors of this article diagnosed non-islet cell tumor hypoglycemia from an 81-year-old male patient suffering from repetitive fasting hypoglycemia while he has not received any treatment for pulmonary hemangiopericytoma diagnosed in the past. Moreover, this topic is getting reported as the authors have experienced a significant improvement of catamnesis by a treatment with glucocorticoid.

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A Case of Epithelioid Hemangioendothelioma of the Pelvic Retroperitoneum with Hypoglycemia
Ji Ryang Kim, Yun Kyung Jeun, Kee Tae Park, Yang Ho Kang, Seok Man Son, In Ju Kim, Yong Ki Kim, Kyung Un Choi, Kwang Jae Lee
Journal of Korean Endocrine Society.2007; 22(6): 440. CrossRef

Role of Thigh Muscle in the Carotid artery Intima-Media Thickness and Insulin resistance.: ll Jun Hwang, Kyung Sun Park, Yun Tae Chae, Kyeh Dong Shi, Soo Kyung Kim, Seok Won Park, Yu Lee Kim, Yong Wook Cho, Young Kil Choi, Sang Jong Lee; J Korean Endocr Soc. 2005;20(5):452-459. Published online October 1, 2005; DOI: https://doi.org/10.3803/jkes.2005.20.5.452

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BACKGROUND
There have been recent reports that the fat distribution within skeletal muscle and the amount of muscle mass are associated with insulin resistance and the development of type 2 diabetes mellitus (T2DM). This study evaluated the impacts of visceral fat and thigh muscle from patients with T2DM and healthy subjects on atherosclerosis and insulin resistance. METHODS: Forty-two patients with newly-developed T2DM and 11 healthy subjects were selected for the study. The diabetic patients were subdivided into two groups, those under 40 years of age, as the young T2DM (n=21) group, and 40 years-old or greater, as the old T2DM (n=21) group. CT scans were obtained for all patients at the L4-L5 level and at the mid-portion between the greater trochanter and upper margin patella. The carotid intima-media thickness (IMT) was also measured using high resolution B-mode ultrasonography. RESULTS: The mean visceral fat area (VFA) in the old T2DM group was 169.4+/-13.2cm2, which was significantly greater than that found in the healthy subjects (67.9+/-7.92cm2, P<0.001) and young T2DM group (127.1+/-10.4cm2, P<0.05). The mean visceral fat to normal density muscle area ratio (VMNR) in the old T2DM group was 1.50+/-0.19, which was greater than in the healthy subjects (0.46+/-0.52, P<0.001) and young T2DM group (1.01+/-0.10, P<0.05). The total thigh muscle areas in the young and old T2DM groups were smaller than that in the healthy subjects, but without statistical significance. VMNR showed a positive correlation with the IMT and HOMA-IR. However, the total thigh muscle area was negatively correlated with the IMT. The normal density muscle area also showed significant negative correlations with the IMT and HOMA-IR. In a multiple regression analysis, age and VMNR were the most important independent risk factors of an increased carotid IMT. CONCLUSION: This study showed that the role of thigh muscle, as well as that of visceral fat, played a very important role in the occurrence of atherosclerosis. VMNR was found to be an especially important independent factor for an increased carotid IMT.

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High fat stores in ectopic compartments in men with newly diagnosed type 2 diabetes: an anthropometric determinant of carotid atherosclerosis and insulin resistance
S-K Kim, S-W Park, I-J Hwang, Y-K Lee, Y-W Cho
International Journal of Obesity.2010; 34(1): 105. CrossRef

The Role of Polymorphism of Adiponectin Gene in the Atherosclerosis.: Yong Wook Cho, Soo Kyung Kim; J Korean Endocr Soc. 2005;20(1):8-11. Published online February 1, 2005; DOI: https://doi.org/10.3803/jkes.2005.20.1.8

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Abstract PDF: No abstract available.

Two Cases with Adrenal Myelolipoma Treated by Surgical Resection.: Jun Lee, Ho Chul Lee, Seung Ha Park, Byung Ik Kim, Seok Won Park, Hwa Young Lee, Yoon Kyong Cho, Yoo Lee Kim, Yong Wook Cho, Sang Jong Lee; J Korean Endocr Soc. 2002;17(4):617-624. Published online August 1, 2002

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Abstract PDF: An increasing number of incidental adrenal masses are found during the evaluation for unrelated problems, which is the result of the development of sensitive noninvasive methods for the imaging of abdominal lesions, such as ultrasonography, computed tomographic scanning, and MRI. When there is no evidence of adrenocortical or medullary dysfunction for such adrenal masses, they are commonly referred to as "incidentalomas". Among these incidentalomas, adrenal myelolipoma is a rare, benign, endocrinologically inactive tumor, the histological structure of which consists of mature adipose tissue cells and normal hemopoietic tissues resembling bone marrow. Even though most eventually prove to be nonhyperfunctioning adrenocortical adenomas, we must not exclude a more serious pathology. Because of the rarity of adrenal myelolipoma, its natural history, proper prognostic considerations and treatment recommendations still need to be investigated. We experienced 46 year-old man with abdominal discomfort, and a 26 year-old man with no specific symptoms, have large incidentalomas (>5 cm) in adrenal sites, detected by abdominal sonography for routine health work-up. The ACTH, cortisol, renin, aldosterenone, metanephrine, VMA and tumor marker levels were normal, which was suggestive of nonfunctional adrenal tumors. Surgical treatments were performed for rule out malignant adrenal tumors due to the tumor size (>5 cm) and hemorrhage within the tumors. The surgical pathology was that of adrenal myelolipomas. An adrenal myelolipoma is a rare, benign, nonfunctional adrenal tumor, but only three cases have been reported in Korea. We report two cases of adrenal myelolipoma found incidentally by surgical treatment for a large tumor size (>5 cm).

A Case of Transient Granulocytopenia during Treatment of a Patient with Graves' Disease and Type 1 Diabetes Mellitus - Differential Diagnosis from Agranulocytosis by a Single Injection of G-CSF.: Jin Kyeong Park, Jeong Hun Seong, Jun Lee, Seon Nyo Chu, Hun Jeong, Yoo Lee Kim, Seok Won Park, Yong Wook Cho, Sang Jong Lee; J Korean Endocr Soc. 2002;17(2):280-285. Published online April 1, 2002

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Abstract PDF: Granulocytopenia, which can be seen in patients with Graves' disease during treatment with antithyroid agents, could be a self resolving transient episode or can imply the beginning of life threatening agranulocytosis requiring a change in treatment modality. Transient granulocytopenia could be a manifestation of hyperthyroidism itself, or a mild side effect of antithyroid drugs. Aganulocytosis is a rare, but major complications of the termination drug, propylthiouracil (PTU), requiring prompt termination of the medication, and intensive care. Therefore, differentiation of agranulocytosis and transient granulocytopenia, is important, but is not practically easy. We introduce a case of transient granulocytopenia, which was detected in a patient with Graves'Disease, accompanied by underlying type 1 diabetes mellitus, during treatment with PTU. Diagnosis of transient granulocytopenia was made by a normal granulocyte count following a single injection of G-SCF, and the patient was treated with conservative therapy. This case confirms a diagnostic tool for differentiating transient granulocytopenia and PTU-induced agranulocytosis.

Clonical Experience on Non-Scrotal Testosterone Transdermal Patch in the Middle Aged Male.: Young Chan Kim, Jong Ho Park, Suk Ki Lee, Young Jin Lee, Chul Young Bae, Yong Wook Cho, Myung Seo Kang, Jung Hoon Kim; J Korean Endocr Soc. 1999;14(1):102-121. Published online January 1, 2001

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Abstract PDF: BACKGROUND
To evaluate metabolic effects of testosterone on whole bodily systems, non-scrotal testosterone transdermal patch was given to middle aged men. METHODS: Sixteen impotent patients with serum testosterone levels between 300 and 500 ng/dL, were recruited for 6 month of treatment with non-scrotal testosterone transdermal delivery system, and six patients dropped during the study. All patients have a non-organic impotence (mean age:48 +/- 7). After 1 month placebo patch running period, patients were given 1 or 2 patches. The parameters were evaluated at each stage; before treatment, after placebo patch, and after testosterone patch for 3 months and 6 months. The evaluation parameters included body weight, blood pressure, heart rate, body mass index (BMI), body fat, haemoglobin, haematocrit, RBC, lipid profiles, Prostatic Specific Antigen (PSA), Transrectal Ultrasonography (TRUS), International Prostatic Symptom Score (IPSS), bone markers such as osteocalcin and Deoxypyridinoline (dPyr), Bone Mineral Density (BMD), psychological evaluation with Questionnaire and hormones such as cortisol, Dehydroepiandrosterone sulfate (DHEA-S), Follicle Stimulating Hormone (FSH), Luteinizing Hormone (LH), prolactin, testosterone and Sex Hormone Binding Globulin (SHBG). Sexual functions were evaluated by means of sexual Questionnaire which has grade systems (high grade means good response) on each domain. RESULTS: Hormonal, hematopoietic, lipid and prostatic parametem were not changed with statistical insignificance. There were no significant changes in BMD. But mean osteocalcin values increased about 31.5% (p<0.05). Bone resorption marker, D-Pyr values were also decreased significantly about 18.6% after 4 montbs treatment, but such changes were not shown after 6 months. Tendencies of improvement in all domains of Sexual Questionnaire were noticed, even though they were not statistically significant except in frequency of coitus and satisfaction with ejaculation (p<0.05), CONCLUSION: Decreased bone resorption was noticed while persistent increased bone formation occurred after 4 months treatment of testosterone. Testosterone supplementation has a beneficial effects on mood and sexual function in the impotent patients with lower borderline testosterone level. And it can be concluded that 6 months testosterone treatment dose not produce any adverse reactions on bodily system.

Clinical Report of Effects of Pre and Post-partum Thyroiditis (PPT).: Yong Wook Cho, Myung Seo Kang, Young Soo Cha, Jin Hwan Kook, Yoo Ri Kim, Pil Won Park, Wee Hyun Lee, Jung Eun Lim, Yo Won Cho; J Korean Endocr Soc. 1997;12(4):541-549. Published online January 1, 2001

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Abstract PDF: BACKGROUND
Excessive iodine intake increases the occurrence of autoimmune thyroid disorders by enhancing immunogenecity of iodine-rich thyroglobulin, In Korea, most of postpartum women take a large amount of iodine-rich seaweed. Although the excessive iodine intake may affect the thyroid function, only a few reports were available concering iodine intake, especially on postpartum period. METHODS: A prospective study was undertaken in 146 of normal delivered postpartum women. Dietary intake and urinary excretion of iodine, serum T3, T4, TSH, anti-TPO Ab and anti-Tg Ab were measured before and 1, 6, 12 and 24 weeks after delivery. Iodine intake was analyzed by one-to-one interview using 24hr recall and food frequency questionnaire. RESULTS: 1. PPT was occurred in 6 (10.3%) postparturn women, It presented as hypothyroidism alone in 1 (16.7%), transient thyrotoxicosis followed by hypothyroidisrn in 3 (50.0%), and thyrotoxicosis alone in 2 (33.3%) of the follwed-up patients. 2. During pregnancy, no difference was found in age, serum T3, T4 and TSH between PPT and normal thyroid function group. 3. In PPT group, anti-TPO and anti-Tg Ab were significantly higher than those of normal thyroid function group during pregnancy, and their sensitivity for PPT was 40% and 33%, respectively. But there was no correlation between dietary iodine intake and the titer of thyroid auto-antibodies. 4. There was no correlation between pre and post-partum dietary iodine intake and occurrence of PPT. CONCLUSION: In Korea, the incidence of PPT was slightly higher than other nations. The sensitivity of thyroid auto-antibodies was too low to use for prediction of PPT. Pre and post-partum iodine intake had no effect on the occurrence of PPT and post-partum thyroid function.

Analysis of Daily Intake and Urinary Excretion of Iodine normal Control and Patient with Thyroid Disease.: Yong Wook Cho, Young Sun Kim, Seung Ho Baick, Do Yeon Oh, Whyui Joon Kim, Myung Wha Kang, Kyung Sook Kim; J Korean Endocr Soc. 1994;9(4):307-317. Published online November 6, 2019

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Abstract PDF: Iodine in physiological dosage is necessary for thyroid hormone. But insufficient or excessive intake of iodine could affect on thyroid function. However, little study is available on the current iodine state in Korea. To evaluate the current state of iodine intake and its effects on thyroid function, we measured the iodine intake, urinary excretion and thyroid status in 67 normal controls and 110 patients with thyroid disease from June 1991 to August 1993.The result were as follows; 1) There were no differences in the physical and daily intake of calorie between controls and patients with thyroid disease. 2) The mean daily intake of iodine was 391.4 ug in normal controls, 695.0 ug in patients with simple goiter, 672.0 ug in hypothyroidism, 453.5 ug in hyperthyroidism, and 297.4 ug in thyroid nodule. 3) The mean urinary iodine excretion was 640 ug/L in normal controls, 875 ug/L in patients with hyperthyroidism, 612 ug/L in thyroid nodule, 563 ug/L in hypothyroidism, and 549 ug/L in simple goiter. 4) There was decreasing tendency of the serum T_3, t_4 and significant increase in TSH concentration in subjects who ingest the dietary iodine above 1000 ug/day compared with the subjects who ingest below 150 ug/day(p<0.05). 5) Subjects who live in coastal area had much intake of iodine(1.8-2.5 times)than those of subjects live in inland area.In conculsion, Korean ingested more iodine than Europian and American but fewer than Japanese. Some of the patients with simple goiter and hypothyroidism patients may associated with excessive ingestion of iodine, but further systemized study will be required.

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