Endocrinology and Metabolism

Kyung Soo Park (Park KS)

20 Articles

Retraction: Multi-country Study on the Prevalence and Clinical Features of Peripheral Arterial Disease in Type 2 Diabetic Patients Who are at High Risk for Atherosclerosis.: Sang Youl Rhee, Seungjoon Oh, Young Kil Choi, Doo Man Kim, Bong Yun Cha, Hyun Chul Lee, Seung Woo Ha, In Kyu Lee, Tae Sun Park, Min Young Chung, In Joo Kim, Moon Kyu Lee, Sung Soo Koong, Kyung Soo Park, Kyung Wan Min, Young Seol Kim; J Korean Endocr Soc. 2007;22(6):478. Published online December 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.6.478

1,691 View
22 Download

PDF

Clinical Characteristics for 132 Patients with Adrenal Incidentaloma.: Hyun Seung Jeong, Hee Joung Kim, Hae Sung Kim, Sang Wan Kim, Chan Soo Shin, Do Joon Park, Kyung Soo Park, Hak Cheol Jang, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee; J Korean Endocr Soc. 2007;22(4):260-265. Published online August 1, 2007; DOI: https://doi.org/10.3803/jkes.2007.22.4.260

2,100 View
20 Download
8 Crossref

Abstract PDF

BACKGROUND
Recently, the detection rate for adrenal incidentaloma in Korea has been on the increase. We describe here the clinical characteristics of these tumors and describe appropriate guidelines of diagnosis and treatment. METHODS: We analyzed age, sex, location, size, function, and the pathological findings for 132 patients with an adrenal mass by CT, USG, and MRI undertaken for health examinations or non-adrenal disease from January 2000 to March 2005. RESULTS: Adrenal masses were most commonly found in patients in their sixties (31%). 62.1% of the patients were men and 37.9% were women. For the location of the masses, 53% were found in the left gland, 43.2% were found in the right gland and 3.8% were found in both glands. Of all of the masses analyzed, 66% were 1 cm to 4 cm in size, and an adenoma-like appearance was the most common finding (69.7%) seen in images. All of the pheochromocytomas and carcinomas were above 4 cm in size. Patients with a functional mass were seen in 18 cases (13.6%) and pheochromocytomas were seen in 12 cases (67%). Three patients were found with cancer (2.3%), two cases (1.5%) of a primary carcinoma and one case of a metastasis (0.8%). CONCLUSION: The frequency and characteristics of benign nonfunctional, functional and malignant masses that were found in our hospital were similar to those presented in studies conducted outside of Korea. Therefore, it may be possible to apply previously established guidelines to domestic patients.

Citations

Citations to this article as recorded by

Guidelines for the Management of Adrenal Incidentaloma: the Korean Endocrine Society, Committee of Clinical Practice Guidelines
Jung-Min Lee, Mee Kyoung Kim, Seung-Hyun Ko, Jung-Min Koh, Bo-Yeon Kim, Sang-Wan Kim, Soo-Kyung Kim, Hae-Jin Kim, Ohk-Hyun Ryu, Juri Park, Jung-Soo Lim, Seong Yeon Kim, Young Kee Shong, Soon Jib Yoo
The Korean Journal of Medicine.2017; 92(1): 4. CrossRef
Clinical Guidelines for the Management of Adrenal Incidentaloma
Jung-Min Lee, Mee Kyoung Kim, Seung-Hyun Ko, Jung-Min Koh, Bo-Yeon Kim, Sang Wan Kim, Soo-Kyung Kim, Hae Jin Kim, Ohk-Hyun Ryu, Juri Park, Jung Soo Lim, Seong Yeon Kim, Young Kee Shong, Soon Jib Yoo
Endocrinology and Metabolism.2017; 32(2): 200. CrossRef
Clinical Characteristics for 348 Patients with Adrenal Incidentaloma
Jongho Kim, Kwi Hyun Bae, Yeon Kyung Choi, Ji Yun Jeong, Keun Gyu Park, Jung Guk Kim, In Kyu Lee
Endocrinology and Metabolism.2013; 28(1): 20. CrossRef
Clinical characteristics and follow-up of Korean patients with adrenal incidentalomas
Yoon Young Cho, Sunghwan Suh, Ji Young Joung, Hyemin Jeong, Dongmo Je, Hongseok Yoo, Taek Kyu Park, Yong-Ki Min, Kwang-Won Kim, Jae Hyeon Kim
The Korean Journal of Internal Medicine.2013; 28(5): 557. CrossRef
Characterization of Incidentally Detected Adrenal Pheochromocytoma
Soon Jib Yoo, Woohyeon Kim
Endocrinology and Metabolism.2012; 27(2): 116. CrossRef
Different diagnostic cut-off values of urinary fractionated metanephrines according to sex for the diagnosis of pheochromocytoma in Korean subjects
Seo Young Sohn, Hyung Doo Park, Soo Youn Lee, Jung Han Kim, Byong Chang Jung, Hye Jeong Kim, Hye Won Jang, Kwang Won Kim, Moon Kyu Lee, Yong Ki Min, Jae Hyeon Kim
Endocrine Journal.2012; 59(9): 831. CrossRef
Characterization of Incidentally Detected Adrenal Pheochromocytoma
Ye An Kim, Yul Hwangbo, Min Joo Kim, Hyung Jin Choi, Je Hyun Seo, Yenna Lee, Soo Heun Kwak, Eu Jeong Ku, Tae Jung Oh, Eun Roh, Jae Hyun Bae, Jung Hee Kim, Kyoung Soo Park, Seong Yeon Kim
Endocrinology and Metabolism.2012; 27(2): 132. CrossRef
The Evaluation and Follow-up of Adrenal Incidentaloma
Sin Gon Kim, Dong Seop Choi
Journal of Korean Endocrine Society.2007; 22(4): 257. CrossRef

Multi-country Study on the Prevalence and Clinical Features of Peripheral Arterial Disease in Type 2 Diabetic Patients Who are at High Risk for Atherosclerosis.: Sang Youl Rhee, Seungjoon Oh, Young Kil Choi, Doo Man Kim, Bong Yun Cha, Hyun Chul Lee, Seung Woo Ha, In Kyu Lee, Tae Sun Park, Min Young Chung, In Joo Kim, Moon Kyu Lee, Sung Soo Koong, Kyung Soo Park, Kyung Wan Min, Young Seol Kim; J Korean Endocr Soc. 2006;21(4):290-301. Published online August 1, 2006; DOI: https://doi.org/10.3803/jkes.2006.21.4.290

1,895 View
27 Download

Abstract PDF: BACKGROUND
PAD-SEARCH (Peripheral Arterial Disease-Screening and Evaluation of diabetic patients in Asian Regions Characterized by High risk factors) is the first international study to investigate the prevalence of peripheral arterial disease (PAD) in Asian type 2 diabetic patients and to demonstrate the relationships between the putative risk factors and PAD in this population. METHODS: A total of 6,625 type 2 diabetic patients (2,873 males and 3,752 females aged 50 and older) were enrolled in PAD-SEARCH in Korea, China, Taiwan, Hong Kong, Indonesia, Thailand and Philippines from October 2003 to March 2004. The Fukuda vascular profile VS-1000(TM) was used to determine the ankle-brachial index (ABI) and the brachial-ankle pulse wave velocity (baPWV). RESULTS: The mean patient age was 63.7 +/- 8.2 years and the mean duration of diabetes was 10.3 +/- 8.0 years. 1,172 (17.7%) subjects were diagnosed as PAD by the ABI (< or = 0.9). Subjects with PAD had a significantly longer duration of diabetes or hypertension, a higher HbA1c level and a significantly lower mean BMI than did the non-PAD subjects. In terms of the lipid profiles, triglyceride was the only significant variable. Notably, the mean ABI and baPWV in the females were significantly poorer than the age matched males for the in subjects with a normal ABI. However, the mean ABI and baPWV in males were significantly poorer than those of the age matched females for the subjects with PAD. On the multivariate analysis, gender, age, BMI, smoking status, duration of diabetes and a previous history of cerebrovascular disease were identified as the independent risk factors of PAD. CONCLUSION: These findings suggest that PAD is a common complication in Asian type 2 diabetic patients. Therefore, PAD screening and treatment should be emphasized for Asian diabetic patients with high risk factors.

Diagnostic Value of 24-hours Urinary Total Metanephrine As a Screening Test of Patients with Suspected Pheochromocytoma.: Sang Wan Kim, Kyung Won Kim, Do Joon Park, Chan Soo Shin, Kyung Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee; J Korean Endocr Soc. 2005;20(1):12-20. Published online February 1, 2005; DOI: https://doi.org/10.3803/jkes.2005.20.1.12

1,437 View
19 Download

Abstract PDF: BACKGROUND
A pheochromocytoma is a rare cause of secondary hypertension. Its diagnosis is important as the hypertension is usually curable by resection of the tumor, whereas the condition is potentially lethal if undetected. Biochemical confirmation of excessive catecholamine production is a prerequisite to a definitive diagnosis. Various studies from other countries have indicated that measuring of the urinary metanephrine, using a specific procedure, is the single most reliable screening test for all patients suspected of having a pheochromocytoma. However, the diagnostic value of urinary metanephrine has never been reported in Korea. We investigated the diagnostic value of 24-hours urinary metanephrine in patients with a suspected pheochromocytoma. METHODS: This was a retrospective evaluation study, which included 95 patients with sustained hypertension and paroxysmal symptoms, and 38 patients with asymptomatic adrenal incidentaloma at Seoul National University Hospital, between July 2000 and October 2002. We performed the 24- hour urinary total metanephrine test on all patients. The diagnosis of a pheochromocytoma was applied only when confirmed by pathological analysis of a resected specimen. The possibility of a pheochromocytoma was ruled out when all biochemical tests were normal, which were performed at least in duplicate, or there was no evidence of a mass in abdominal radiological studies or histological verification. We determined the upper reference limit for urinary metanephrine as 1.3mg/day and calculated the sensitivity and specificity of the 24-hour urinary metanephrine test. RESULTS: Seventeen patients were diagnosed with a pheochromocytoma. The total metanephrine measurement had sensitivities and specificities of 82.4 and 73.3% in all the patients, 90.9 and 66.7% in patients with hypertension and paroxysmal symptoms, and 66.7 and 90.6% in patients with adrenal incidentaloma, respectively. CONCLUSION: The urinary total metanephrine measurement had relatively lower sensitivities and specificities than in other countries(sensitivity: 83~100%, specificity: 80~98%). The sensitivity of urinary metanephrine was relatively high in patients with hypertension and paroxysmal symptoms, and the specificity was high in patients with an adrenal incidentaloma. We suggest that normetanephrine and metanephrine should be separately measured, and a reasonable upper reference limit be used. It may also be necessary to measure urinary metanephrine together with urinary catecholamine or VMA to improve the diagnostic value of the urinary metanephrine test.

Relationship between Adiponectin, Leptin and Body Fat in Men with Hypogonadism Before and After Testosterone Treatment.: Sang Wan Kim, Joon Ku Kang, Do Joon Park, Chan Soo Shin, Kyung Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee; J Korean Endocr Soc. 2004;19(5):473-484. Published online October 1, 2004

1,116 View
19 Download

Abstract PDF: BACKGROUND
Testosterone replacement therapy in men with hypogonadism improves sexual function, decreases body fat, and increases the mass and function of lean muscle. These beneficial effects of testosterone replacement therapy are accompanied by slight lowering of the high density lipoprotein (HDL) cholesterol levels, increase in the hematocrit/hemoglobin ratio and size of the prostate gland. It is presently unknown whether the effect of testosterone on body fat could also reduce the risk of atherosclerotic disease associated with obesity. We investigated the relationship between body fat and blood leptin and adiponectin levels to elucidate the effect of testosterone on body fat metabolism, as well as the effect of testosterone on lipid and bone metabolism. METHODS: We selected 28 men, who were hypogonadal (mean serum testosterone+/-SD, 22.3+/-35.3 ng/dL) due to an organic disease, and them with oral testosterone (testosterone undecanoate) for 12 months. We measured the body composition, serum leptin, plasma adiponectin, biochemical bone markers, bone mineral density, prostate-specific antigen, and serum lipids before and 3, 6 and 12 months after treatment. We analyzed the relationship between body fat and blood leptin and adiponectin levels. RESULTS: The mean serum testosterone concentration reached the subnormal range after 6 months of treatment, which remained for the duration of treatment. The fat mass decreased and muscle mass increased, not within the first 6 months, but principally within 12 months (p<0.05). Although the decrease in the serum leptin level was not statistically significant, there were positive correlations between the leptin level and fat mass before and after 6 months of treatment (p<0.05). The plasma adiponectin did not increase or correlate with body fat parameters. The bone mineral densities of the lumbar spine (L2-L4) and femoral neck did not increased, but the serum osteocalcin and urine N-telopeptide were significantly decreased (p<0.05 and <0.01, respectively). The HDL-cholesterol decreased, principally within the first 6 months (p<0.01), but the total and LDL cholesterols, and the triglycerides remained unchanged during the course of treatment. There was also no change in prostate-specific antigen. CONCLUSION: Twelve months of oral testosterone replacement in men with hypogonadism improved body composition and bone metabolism, but demonstrated subnormal serum testosterone levels, had no effect on the leptin and adiponectin levels and decrease in HDL-cholesterol levels. It will be necessary to examine the long-term effects of testosterone replacement on the incidence of cardiovascular events as well as cardiovascular risk factors in men with hypogonadism

Diagnostic Value of 1microgram Rapid ACTH Stimulation Test According to the Timing of Sampling of Serum Cortisol in Patients with Suspected Central Adrenal Insufficiency.: Sang Wan Kim, Young Min Cho, Do Joon Park, Chan Soo Shin, Kyung Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee; J Korean Endocr Soc. 2004;19(1):33-41. Published online February 1, 2004

1,243 View
20 Download

Abstract PDF: BACKGROUND
Traditional testing of the hypothalamic-pituitary-adrenal axis function has essentially relied upon the insulin tolerance test or the metyrapone test(both tests are not only uncomfortable, but are also dangerous). The standard ACTH stimulation test uses an extremely supra-physiologic amount(250f microgram) of ACTH to evaluate a physiological response, which may result in a false normal response. The 1microgram rapid ACTH stimulation test is more physiological and more sensitive than the standard test, but there exist much controversy about when the serum cortisol should be measured or what the most appropriate cut-off point is for normality or whether the 1microgram ACTH commercial solution is needed. The aims of this study were to investigate 1) whether 1microgram of ACTH is an appropriate amount to stimulate the adrenal gland of patients that have suspected central adrenal insufficiency compared with insulin tolerance test(ITT) and 2) the diagnostic value of the 1microgram rapid ACTH stimulation test according to timing of sampling of serum cortisol. METHODS: In order to evaluate the dose-response relationship between ACTH and cortisol, we performed the ITT in 77 patients with suspected central adrenal insufficiency with serial measurements of serum cortisol and plasma ACTH. We drew the blood samples in 10 min intervals between 10 and 60 min after the administration of 1microgram ACTH in 39 patients with central adrenal insufficiency and in 38 pituitary control patients with pituitary. ITT was used to confirm the diseases for the patients of central adrenal insufficiency, but for pituitary control patients, the ITT indicated normality in the patients. Also, all subjects underwent the 250microgram rapid ACTH stimulation test, and we compared the diagnostic value of the 1microgram ACTH stimulation test with the 250microgram test. RESULTS: 1) The plasma ACTH level after the 1microgram ACTH stimulation test, even if it was be assumed as approximately 300pg/mL, was expected to be sufficient enough to stimulate the adrenal cortex normally(serum cortisol levels >18microgram/dL) compared to the plasma ACTH level in the ITT. 2) The sensitivity and specificity of the 1microgram rapid ACTH stimulation test was highest with 92.3% and 84.2%, respectively, when serum cortisol levels were measured at 20, 30, and 40 min after the ACTH injection. The 1microgram rapid ACTH stimulation test was more sensitive than the 250microgram ACTH test(sensitivity: 92.3%, specificity: 71.8%). CONCLUSION: The 1microgram rapid ACTH stimulation test was more sensitive test in patients with suspected central adrenal insufficiency, and blood samples for cortisol levels should be drawn at 20, 30, and 40 min after ACTH administration.

Determination of Glucocorticoid Replacement Therapy and Adequate Maintenance Dose in Patients with Secondary Adrenal Insufficiency.: Sang Wan Kim, Hye Seung Jung, Seong Hee Kwon, Do Joon Park, Chan Soo Shin, Kyung Soo Park, Seong Yeon Kim, Bo Youn Cho, Hong Kyu Lee; J Korean Endocr Soc. 2003;18(5):456-464. Published online October 1, 2003

1,087 View
20 Download

Abstract PDF: BACKGROUND
Determination of the adequate dose of glucocorticoid replacement therapy, in patients with secondary adrenal insufficiency, is of great importance to avoid the consequences of under or over treatment. The aims of this study were: 1) to assess the value of adrenal cortical function tests in determining whether glucocorticoid replacement should be given, and 2) to investigate the adequate maintenance dose of glucocorticoid in patients with secondary adrenal insufficiency. METHODS: Forty patients, with secondary adrenal insufficiency, confirmed by the insulin-induced hypoglycemia test (IHT), were studied. All subjects underwent basal serum cortisol measurement, IHT and 250 g rapid ACTH stimulation tests (AST). The clinical usefulness of these tests, for the determination of glucocorticoid replacement therapy, was evaluated in patients with secondary adrenal insufficiency. 26 of the 40 patients had received prednisolone (Pd) (5 mg per day) replacement due to symptoms from adrenal insufficiency. The dose of Pd was serially changed from 5 to 3.75, and then to 6.25 mg per day, every 3 month. The measured lipid parameters, serum osteocalcin and urinary N-telopeptide were measured and the quality of life evaluated by the administration of an Addisonian questionnaire, both before and after the dose changes. RESULTS: 1) For all tests, cut-offs were selected that would provide adequate specificity and sensitivity. When the cut-offs were set to provide 95% specificity, the corresponding sensitivitycut-off values, obtained with basal serum cortisol, peak serum cortisol in IHT and AST were: 88.4% <5 microgram/dL, 80.7% <11 microgram/dL and 76.9% <16 microgram/dL. 2) The urinary type I collagen N-telopeptide, total cholesterol, HDL- and LDL-cholesterol levels were significantly increased, and the serum osteocalcin levels significantly decreased when the daily dose of Pd was increased to 6.25 from 3.75 or 5 mg. The LDL-cholesterol levels especially, were significantly increased, even though the change in the Pd from 3.75 to 5 mg per day was subtle. CONCLUSION: The basal cortisol levels, HPA axis tests and the symptoms of patients may be helpful to determine whether prednisolone replacement therapy should be given. It is suggest that an adequate dose of glucocorticoid replacement therapy should be not exceed Pd 5mg per day, so as not to have adverse effects on the bone and lipid metabolisms.

Interaction of Pituitary Adenylate Cyclase-Activating Polypeptide and Angiotensin II on Aldosterone Production in Human Adrenocortical H295R Cells.: Seong Yeon Kim, Sang Wan Kim, Young Min Cho, Do Joon Park, Chan Soo Shin, Kyung Soo Park, Bo Youn Cho, Hong Kye Lee; J Korean Endocr Soc. 2003;18(3):272-282. Published online June 1, 2003

971 View
19 Download

Abstract PDF: BACKGROUND
Evidence is accumulating that aldosterone secretion can be regulated in a paracrine and/or an autocrine manner by several neuropeptides locally released within the adrenal gland. Among neuropeptides, pituitary adenylate cyclase-activating polypeptide (PACAP) is present in high concentration in the human adrenal gland. The purpose of this study was to investigate the action of PACAP and the interaction between PACAP and angiotensin II (AII), the main physiologic aldosterone secretagogue, in aldosterone production in human H295R adrenocortical cells. METHODS: H295R cells were incubated with increasing concentrations of PACAP (10(-11)M~10(-7)M) in the absence or presence of 10(-7)M AII. Aldosterone concentration in the supernatant was determined by RIA. Intracellular cAMP content was measured by RIA and total inositol phosphate (IP) production by anion exchange chromatography. Gene expression of CYP11B2 was studied by RT-PCR. RESULTS: In H295R cells, PACAP stimulated aldosterone production in a dose-dependent manner. Incubation of H295R cells with PACAP in the presence of AII significantly increased aldosterone production, compared with that of PACAP alone. PACAP dose-dependently increased cAMP production, but 10(-7)M AII had no effect on either basal or PACAP-stimulated cAMP production. Total IP production was not affected by PACAP, but was increased by 10(-7)M AII; an increase that was not further increased by addition of PACAP. RT-PCR analysis of H295R cells which were exposed to 10-7M PACAP or 10(-7)M AII showed an increase in CYP11B2 transcript signal. Induction of CYP11B2 mRNA expression in response to treatment with both PACAP and AII was significantly more than that resulting from using PACAP alone. CONCLUSION: The present study demonstrates that PACAP exerts a direct stimulatory effect on aldosterone production through induction of CYP11B2 mRNA expression by adenylate cyclase activation as the main intracellular signal pathway in H295R cells. Furthermore, there may be some additive effects between PACAP and AII on aldosterone production.

A Case of Black Adrenocortical Adenoma Causing Cushing's Syndrome with Contralateral Nonfuncioning Adenoma.: Do Joon Park, Kyung Soo Park, Kyung Jae Nam, Sung Yeon Kim, Bo Yeon Cho, Hong Gyu Lee, Yeo Kyu Yoon, Seung Keun Oh; J Korean Endocr Soc. 1999;14(2):410-417. Published online January 1, 2001

1,025 View
17 Download

Abstract PDF: We report herein the case of a 38-year-old woman with Cushings syndrome caused by bilateral adrenocortical adenomas. The adrenal tumor on the left side hypersecreted cortisol and no findings of cortisol hypersecretion from the adrenal tumor on the right side were observed on bilateral adrenal vein samplings. Both adrenal tumors were resected and histologically without any findings of nodular hyperplasia. The left adrenal tumor was histologically diagnosed as a so-called black adenoma. These data imply that the adrenal adenomas developed primarily from the adrenal gland itself, and that one of the tumors was well differentiated and secreted excess hormones, while the other remained in cell proliferation without hypersecretion.

Serum Leptin in Cord Blood and Its Relation with Birth Weight and Metabolic Parameters.: Do Joon Park, Yun Yong Lee, Kyung Soo Park, Sung Yeon Kim, Bo Yeon Cho, Hong Gyu Lee, Gun Sang Park, Jong Kwan Jun, Bo Hyun Yoon; J Korean Endocr Soc. 1999;14(2):365-371. Published online January 1, 2001

948 View
17 Download

Abstract PDF: BACKGROUND
Leptin, produced in the adipose tissue, is involved in the regulation of body weight. The release of the leptin is increased in obese adults even in children. This study investigated whether the serum leptin in cord blood was related to babys birth weight and metabolic parameters. METHODS: 71 pairs of singleton pregnancy babies and their mother were studied. Babies are classified in LGA (large for gestational age), AGA (appropriate for gestational age), SGA (small for gestational age) three groups. After delivery, cord blood and maternal venous blood samples were drawn. We measured the plasma leptin, insulin-like growth factor (IGF)-1, insulin and proinsulin in cord and maternal serum. RESULTS: The concentration of leptin from cord blood was increased in LGA babies and decreased in SGA babies compued with the level in AGA babies. There was positive correlatian (r=0.55, p<0.01) between the plasma leptin level in cord and birth weight. There were positive correlatian between both the plasma proinsulin (r=0.37, p<0.01) and IGF-1 (r=0.32, p<0.01) and birth weight, too. But there was no difference between female and male baby's cord blood leptin level. In multiple regression analysis, cord blood leptin level was found independent factor related to birth weight ( p=0.001) CONCLUDION : The plasma leptin, proinsulin and IGF-1 is correlates to the birth weight. These data provide evidence that leptin and proinsulin are highly related to the nutritional status already during the fetal periods, and effect on the intrauterine fetal growth.

The Incidence of Postpartum Thyroiditis and Effect of High Iodine Intake on it in Korean Women.: Won Bae Kim, Chang Hoon Yim, Kyung Soo Park, Byoung Sool Moon, Jae Hoon Lee, Hye Won Jun, Ho Jun Jin, Sung Yeon Kim, Bo Yeon Cho, Hong Gyu Lee; J Korean Endocr Soc. 1998;13(3):339-350. Published online January 1, 2001

1,084 View
28 Download

Abstract PDF: BACKGROUND
Postpartum thyroiditis(PPT) is one of syndromes of thyroid dysfunction that occurs in the first year after parturition. Reported incidence of PPT is 3.9-8.2% of postpartum women in several studies from different countries. The fact that 52-100% of patients with PPT have thyroid autoantibodies, and that lymphocytic infiltration of thyroid gland is the characteristic pathological feature of PPT suggest that PPT is an autoimmune disease. High iodine intake in short term period is known to aggrevate the experimental autoimmune thyroiditis. This study was performed to investigate the incidence and clinical features of PPT in Korean postpartum women who usually ingest excessive amount of idine in immediate postpartum period and to investigate the predictive value of thyroid autoantibodies in the development of PPT in them. METHOD: Between March 1996 and February 1997, 99 women without previous history of any thyroid disease who delivered babies at Boramae hospital were enrolled. Thyroid function parameters(T3, T4, free T4, TSH), thyroid autoantibodies(anti-microsomal antibody, anti-thyroglobulin antibody) and urinary iodine excretion were measured prospectively before and 1, 3 months after delivery. Dietary iodine intake during postpartum period was evaluated by questionnaire, and clinical parameters were followed up. RESULTS: During 3 months of observation, PPT developed in 8.1%(8/99) of postpartum women. Five cases had typical course having thyrotoxic phase and the other 3 cases had hypothyroid phase without toxic phase. However, only one of those required thyroid hormone replacement therapy in the latter group. There were no differences in age, baseline thyroid function parameters, parity, percent cases with family history of thyroid disease between those developed PPT (n=8) and those did not develop PPT(n=91). Duration of high iodine intake(3.8 +- 0.5 wk. vs. 3.7 +- 0.8 wk., p>0.05), total ingested amount of high iodine diet(77 +- 28 vs. 79 +- 24 bowels of miyokguk, p)0.05), and the urinary iodine excretion(1.9 +- 1.4 mg/g creatinine vs. 3.7 +- 3.7mg/g creatinine, p0.05) at 1 month postpartum were not different between two groups. Of 99 total subjects, anti-microsomal antibody(AMA) was present in 13.1%(13/99) before delivery in their sera. Positive predictive value of the presence of AMA before delivery in predicting the development of PPT was 30.8%. CONCLUSION: The fact that incidence of PPT in normal Korean postpartum women who usually have high iodine intake in immediate postpartum period is not higher than those of other countries, and that there was no difference in the amount of iodine intake between those developed PPT and those did not suggest that high iodine intake in immediate postpartum period do not influence on the incidence of PPT. The presence of AMA before delivery had low specificity in prediction of development of PPT, so the measurement of AMA seems not to be a useful screening test.

Comparison of Anterior Pituitary Function between Patients with GH-secreting Macroadenoma and those with Nonfunctioning Macroadenoma.: Kyung Soo Park, Hyung Kyu Park, Jae Seok Jun, Jae Jun Koh, Sung Yeon Kim, Hong Gyu Lee; J Korean Endocr Soc. 1998;13(3):331-338. Published online January 1, 2001

1,042 View
17 Download

Abstract PDF: BACKGROUND
Some of the deficiencies in anterior pituitary function identified in subjects with macroadenomas appear to represent irrevemible necrosis of normal pituitary cells, and in addition reversible damage to viable glandular tissue and/or incomplete interruption of local circulation by compression of pituitary stalk may also contribute significantly to hypopituitarism. So anterior pituitary function may actually improve in some patients undergoing successful tumor resection or reduction in tumor size. Although direct comparisons of pituitary function among the various pituitary tumors are not presently available it was reported that there is some difference in the degree of pituitary impairment between patients with nonfunctioning macroadenoma(NFMA) and those with GH-secreting macroadenoma(GHMA).In this study, to investigate the difference in the degree of hypopituitarism we compared anterior pituitary function in subjects with NFMA to that in patients with GHMA. METHODS: In this retrospective study, preoperative and postoperative anterior pituitary function was assessed by clinical findings, basal hormone levels and/or combined pituitary stimulation test in 29 subjects with NFMA and in 24 subjects with GHMA. RESULTS: 1. There was no difference in age, sex, tumor size distribution between the two groups. 2. Preoperatively, NFMA patients had a higher prevalence of secondary hypothyroidism(34% vs. 5%; p(0.02) compared to subjects with GHMA. Patients with NFMA also had a higher prevalence of more severe pituitary failure compared with acromegalic patients; 48% of the patients in this group had more than one pituitary hormone axis impaired compared to 17% in the acromegalic group(p0.03). 3. Postoperatively, NFMA patients also had a higher prevalence of secondary hypoadrenalism (52% vs. 11%; p 0.01) compared with acromegalic patients. Additionally, the prevalence who had more than one pituitary hormone axis impaired was still greater in NFMA patients than in the acromegalic group(57% vs. 22%; p=0.054). 4. No correlation was found between the severity of pituitary failure and tumor size or extension in both groups before and after surgery. CONCLUSION: These findings suggest that anterior pituitary function is relatively better preserved in patients with GHMA than those with NFMA and that this difference is independent of tumor size and extension. The mechanism underlying the lower rate of hypopituitarism in acromegalics with macroadenoma remains to be elucidated.

Outcome of Surgery and Radiotherapy in Acromegaly.: Chan Soo Shin, Chang Hoon Yim, Hee Won Jung, Dae Hee Han, Do Joon Park, Hee Jin Kim, Yun Yong Lee, Kyung Soo Park, Il Han Kim, Sung Yeon Kim, Hong Gyu Lee; J Korean Endocr Soc. 1998;13(2):156-166. Published online January 1, 2001

963 View
17 Download

Abstract PDF: BACKGROUND
The primary goal of therapy for acmmegaly is to reduce excess growth hormone (GH) secretion through surgical excision of pituitary adenoma and, in patients with large tumors, to debulk tumor mass and decompress adjacent structures. For the patients in whom surgery is contraindicated or has failed, radiotherapy should be considered. However, there was no analysis of the outcome folIowing the treatment of acromegly in Korea. METHODS: We retrospectively reviewed 128 patients who underwent surgical excision or radiotherapy for acromegaly and followed at our hospital between January 1980 and July 1997 to investigate the outcome of surgny and radiotherapy for acromegaly and to analyze preoperative and preradiotherapeutic parameters that predict a successful outcome of therapy. RESULTS: Pituitary adenomectomy was underwent to the 113 patients with acromegaly, then 33.6% of them showed basa1 GH levels below 5 ug/L and basal GH levels were dropped below 2.5 ug/L in 22.1% of the 113 patients. Postoperative basal GH levels were significantly correlated with preoperative tumor size(r=0.54, p<0.05) and preoperative GH levels(r=0.44, p<0.05). A successful outcome of surgery was influenced by preoperative tumor size, preoperative GH level and extrasellar extension. Multivariate analysis indicated that preoperative tumor size was an independent significant factor affecting the postoperative outcome(OR=2.19, p<0.05). After radiotherapy, the median years of decrease GH<10ug/L and <5ug/L were 3.7 and 7.8, respectively and GH levels of <5ug/L occurred in 35 percent of the patients at 5 years and in 56 percent at 10 yeats. The outcome of radiotherapy depends on the GH levels in preradiotherapy. CONCLUSION: The most reliable prognostic preoperative parameter of successful outcome of surgery was preoperative tumor size and the rate of fall in serum GH after radiotherapy is comparable to the preradiotherapy GH levels in our study, so that early diagnosis and proper treatment can improve the outcome of therapy in the patients with acromegaly. In the cases of large GH-secreting pituitary adenoma, it is required a combination of surgery and radiotherapy to achieve maximal suppresssion of GH levels before radiotherapy.

A Clinical Study on Hypopitutiarism: Significance of Combined Pituitary Stimulation Test.: Bo Youn Cho, Hong Gyu Lee, Chang Soon Koh, Hyung Kyu Park, Sook Kyung Kim, Chan Soo Shin, Seong Yeon Kim, Jae Seok Chun, Kyung Soo Park, Hyeon Kyu Kim, Sun Wook Kim; J Korean Endocr Soc. 1996;11(3):268-276. Published online November 7, 2019

1,242 View
25 Download

Abstract PDF: Background
Hypopituitarism can be caused by various diseases. Its clinical manifestations vary, depending on the extent and severity of the pituitary hormone deficiency. And some patients may initially present with SIADH-like features. Combined pituitary stimulation test has been used for the diagnosis of hypopituitarism and subsequent hormone replacement therapy. However, the test is laborious, expensive and uncomfortable to the patients, So we performed this study to know whether combined pituitary stimulation test can be replaced with clinical features and simple basal hormone concentrations. Methods: Fifty-four patients who were diagnosed as hypopituitarism by combined pituitary stimulation test were included in this study. Clinical features and basal hormone data were compared with the results of combined pituitary stimulation test for the evaluation of pituitary-gonadal, pituitary-thyroid, and pituitary-adrenal axes, using X2 test. Results: 1) In pituitary-gonadal axis, the evaluation of clinical features and basal gonad hormone concentrations were significantly consistent with stimulation test(p<0.05), 2) In pituitary-thyroid axis, the evaluation of basal thyroid hormone concentrations were more helpful than stimulation test though results of the two tests were not consistent. 3) In pituitary-adrenal axis, all patients whose basal cortisol concentrations were low showed inadequate responses to stimulation test. However, stimulation test revealed adrenal insufficiency in some patients with normal basal cortisol concentrations. 4) 9 patients who presented with SIADH-like features were older than the others and had all corticotropin deficiency. Conclusion: In patients with suspected hypopituitarism, the evaluation of clinical features and basal hormone concentrations can be sufficient for the diagnosis of hypopituitarism and hormone replacement therapy. However, stimulation test is necessary to investigate adrenal function in patients with normal basal cortisol concentrations. And hypopituitarism should be considered in old patients who present with SIADH-like features.

Clinical Characteristics of Graves' Disease Patients with Undetectable Thyrotropin Binding Inhibitor Immunoglubulin (TB2).: Bo Youn Cho, Won Bae Kim, Hong Gyu Lee, Chang Soon Koh, Seong Yeon Kim, Seok In Lee, Jae Seok Chun, Kyung Soo Park; J Korean Endocr Soc. 1996;11(1):68-74. Published online November 7, 2019

1,618 View
20 Download

Abstract PDF: Background
Graves disease is an autoimmune disease caused by TSH receptor antibodies. Thyrotropin binding inhibitor immunoglobulins(TBII) are detected in most Graves patients, but some patients have no TBII activities in their sera. It is unknown whether the clinical features of TBII-positive patients are different from those of TBII-negative patients. Methods: To evaluate the prevalence of TBII-negative Graves' patients and its clinical differences from TBII-positive patients, we examined TBII by radioreceptor assay in 686 consecutive untreated Graves patients. We found 84 TBII-negative patients(15 men and 69 women, mean age ±EM: 40.9±.4 years) and compared their clinical characteristics with 87 TBII-positive patients (22 men and 65 women, mean age±EM: 39.9±.5 years) who were selected randomly from the same patients group. Results: In this study, TBII was undetectable in 12.2% of patients with Graves' disease(84 of 686). TBII-negative group had a less weight loss than TBII-positive group. However, there was no significant differences in age, sex ratio, prevalence of ophthalmopathy, duration of illness and positive rate of family history for thyroid diseases between TBII-negative and -positive groups. Serum total T or T levels were not different from each other, but T3-uptake was significantly higher in TBII-positive group than that in TBII-negative group, suggesting that the free hormone levels in TBII-negative group might be lower. The thyroid uptake of 99mTcO4 was significantly higher in TBII positive group than that in TBII-negative group. Thyroid autoantibodies, including antimicrosomal and antithyroglobulin antibodies were detected in almost all patients but there were no differences in titers and positive rate between TBII-negative and -positive groups. Conclusion: Although TBII-negative Graves patients showed less weight loss and low 99mTc04 thyroidal uptake compare to TBII-positive patients, the clinical and immunological characteristics of TBII-negative patients are not different from TBII-positive one.

Relationship between Blood Pressure and Insulin Level or Red Cell Membrane Na+ Transport in Acromegaly.: Seong Yeon Kim, Hyun Kyu Kim, Kyung Soo Park, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh; J Korean Endocr Soc. 1995;10(1):35-44. Published online November 6, 2019

1,097 View
18 Download

Abstract PDF: To test the hypothesis that hyperinsulinemia and/or abnormalities of red cell membrane Na^+ transport are concerned in the pathogenesis of hypertension, we investigated the relationship between blood pressure, insulin level and red cell membrane Na^+ transport in patients with acromegaly which is frequently associated with hypertension, hyperinsulinemia and abnormalities of red cell membrane Na^+ transport.The results were as follows;1) BMI and both systolic and diastolic blood pressure were significantly higher in patients with acromegaly than in control subjects.2) Fasting glucose and insulin levels were higher, and both serum glucose and insulin responses after a 75g glucose load were significantly increased in patients with acromegaly as compared with control subjects.3) Vmax of Na^+-Li^+ countertransport were significantly higher in patients with acromegaly than in control subjects while red cell Na^+ concentration and Vmax of Na^+, K^+ ATPase were similar in the two groups.4) In multiple stepwise regression analysis, age was directly correlated with both systolic and diastolic blood pressure in acromegaly. On the other hand both insulin level and red cell membrane Na^+ transport showed little correlation with either systolic or diastolic pressure. 5) Prevalence of hypertension in acromegaly was 39%(9 out of 23) and only age except for blood pressure was significantly higher in hypertensive acromegalic patients than in normotensive acromegalic patients while GH level, insulin levels and red cell membrane Na^+ transport were similar in the two groupsThese results suggest that hyperinsulinemia or abnormalities of red cell membrane Na^+ transport are not causally related to hypertension in patients with acromegaly.

A Case of Thyroid Anaplastic Cancer with Intestinal Metastasis.: Seong Yeon Kim, Kyung Soo Park, Bo Youn Cho, Hong Kyu Lee, Chang Soon Koh, Jae Seok Jeon, Min Seon Kim, Won Bae Kim; J Korean Endocr Soc. 1994;9(4):375-379. Published online November 6, 2019

1,166 View
23 Download

Abstract PDF: Thyroid anaplastic cancer is one of the most malignant neoplasms encountered in human. These tumors usually present as rapidly enlarging neck mass in old patients who may or may not have had a previously recognized goiter. The distant metastases of anaplastic cancer eventually occur in about 50% patients, mostly in the lung and bone and are an important prognostic factor, substantially reducing survival time.A 66-year old man visited out hospital because of rapidly growing anterior neck mass and hoarseness. He was diagnosed as thyroid anaplastic cancer with lymph node and lung metastasis and received combined chemotherapy and radiation therapy. On the 8th hospital day, severe abdominal pain developed and exploratory laparotomy was conducted. During operation, two intestinal mass were discovered, one of which was perforated. The microscopic examinations showed that undifferentiated malignant cells were infiltrated in the wall of small bowel. We report this case because we first experienced thyroid anaplastic cancer with intestinal metastasis.

Insulin Resistance, Body Fat Distribution, and Sex Hormones in Healthy Men and Premenopausal Women.: Seong Yeon Kim, Kyung Soo Park, Bo Youn Cho, Hong Kyu Lee, Chan Soo Shin, Chang Soon Koh, Tae Geun Oh, Woon Bae Kim; J Korean Endocr Soc. 1994;9(4):366-374. Published online November 6, 2019

1,203 View
22 Download

Abstract PDF: It is well known that obesity central obesity is associated with insulin resistance and some studies reported that sex hormones were associated with insulin resistance. Recently, low levels of sex-hormone binding globulin(SHBG), an indirect index of androgenicity, have been observed to predict the development of non-insulin dependent diabetes mellitus(NIDDM) in women and SHBG has been proposed as a marker for insulin resistance. In contrast to findings in women, decreased SHBG did not predict the occurrence of NIDDM in men, so it is suggested that sex hormones may have a different role for insulin resistance between men and women. To investigate the difference of the associations among the body fat distribution, sex hormone and insulin sensitivity index in men and women, we measured body-mass index(BMI) and waist to hip circumference ratio(WHR) and concentrations serum SHBG, total testosterone, free testosterone, and dehydroepiandrosterone sulfate(DHEA-S) concentrations in 29 healthy adults(men:19, women:10) who showed normal glucose tolerance. Insulin sensitivity index(M/I) was measured by euglycemic hyperinsulinemic clamp. There were no differences in age, BMI, fasting plasma glucose, insulin and free fatty acid levels between men and women. WHR of men is higher than that of women(0.82+-0.01 vs. 0.73+-0.01, p=0.002). Insulin sensitivity index(M/I) is similar in men and women(7.80+-0.71 mg/kg/min/uU/ml X 100 vs. 9.74+-0.89 mg/kg/min/uU/ml X 100, p=0.196).In Pearson's correlation, M/I was significantly correlated with BMI(r=-0.69, p<0.01) and WHR(r=-0.68, p<0.01) in men and DHEA-S(r=-0.68, p<0.05) and SHBG(r=0.61, p=0.056) concentrations in women.In multiple regression analysis, M/I had the most significant association with BMI(R^2=0.484, beta=-0.696, p<0.001) in men and DHEA-S(R^2=0.471, beta=-0.686, p<0.05) concentration in women.Conclusively, we found that sex hormones were significantly associated with insulin resistance and the effects of sex hormones on insulin resistance may be different in men and women.

Effect of Antiliyolytic Agents on Glueose Metabolism in Thyrotoxic Patients.: Seong Yeon Kim, Kyung Soo Park, Bo Youn Cho, Hong Kyu Lee, Chan Soo Shin, Chang Soon Koh, Hun Ki Min, Tae Geun Oh, Chul Hee Kim, Moon Kyu Lee, Jong Ho Ahn, Kee Up Lee; J Korean Endocr Soc. 1994;9(4):325-331. Published online November 6, 2019

1,187 View
18 Download

Abstract PDF: Decreased glucose tolerance is often found in patients with thyrotoxicosis but the pathogenetic mechanisms are poorly understood. Since the concentrations of free fatty acid are usually elevated due to increased lipolysis in thyrotoxicosis, the preferential oxidation of the free fatty acids may explain the decreased glucose tolerance in hyperthyroidism. The aim of this study was to investigate whether lowering plasma free fatty acid(FFA) by acipimox, a long-acting antilipolytic agent, could affect glucose metabolism in thyrotoxicosis. We performed intravenous glucose tolerance test with acipimox or placebo in 6 untreated thyrotoxicmen and 6 age-and body mass index(BMI)-matched controls. The following results were obtained.1) The basal plasma FFA concentration in thyrotoxic patients were significantly higher than those in controls(997.0+-303.4 uEq/L vs. 290.5+-169.1 uEq/L; p<0.01). 2) Plasma FFA concentrations decreased rapidly with acipimox ingestion in both controls and thyrotoxic patients.3) Plasma glucose concentrations were significantly lower with acipimox ingestion than with placebo in thyrotoxic patients from 17min after intravenous glucose load and to the end of the study.4) Plasma insulin concentrations in thyrotoxic patients with acipimox ingestion were higher at 5, 7 min after iv glucose load.5) In thyrotoxic patients, glucose disappearance rate(K_glucose) in acipimox treatment was significantly higher than that in placebo treatment(2.44+-0.84 vs. 1.58+-0.37;p<0.05). 6) K_glucose values were inversely correlated with basal FFA concentrations(r=-0.58, p<0.05). In summary, in thyrotoxic patients with elevated plasma FFA levels, acipimox lowered plasma FFA, which in turn improved glucose tolerance.

A Clinical study on the diagnesis and Treatment of Cushing's Disease - The significance of bilateral inferior petrosal sinus sampling -.: Seong Yeon Kim, Kyung Soo Park, Bo Youn Cho, Hong Kyu Lee, Jae Seok Jeon, Hyeong Kyu Park, Chang Soon Koh, Hun Ki Min, Heu Won Jeong, Dae Hee Han, Moon Hee Han, Kee Hyun Jang; J Korean Endocr Soc. 1994;9(2):115-120. Published online November 6, 2019

1,099 View
19 Download

Abstract PDF: Bilateral inferior petrosal sinus sampling(IPSS) is known to be useful for the differential diagnosis of ACTH-dependent Cushing's syndrome and for the preoperative localization of pituitary microadenomas.To evaluate the usefulness of IPSS, we performed the procedure in the 17 cases of ACTH-dependent Cushing's syndrome including 2 cases of macroadenomas, 6 of them with CRH stimulation test. A inferior petrosal sinus-to-peripheral ACTH ratio of 2:1 or greater(3:1 after CRH stimulation) indicates a pituitary source of ACTH hypersecretion, and a ratio of the ACTH level in one inferior petrosal sinus to the ACTH level in the other of 1:4 or greater lateralizes the microadenomas to that half of the pituitary gland.With these criteria, we diagnosed Cushing's disease in 15 of 17 cases of ACTH-dependent Cushing's syndrome, and localized the lesion in 8 of 13 cases of microadenoma.In conclusion, IPSS with CRH stimulation has high diagnostic accuracy in the differential diagnosis of ACTH-dependent Cushing's syndrome, but still has the limitations on the localization of microadenoma.

Author index