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A Closer Look at Papillary Thyroid Carcinoma.

Endocrinology and Metabolism.2015;30(1):1-6. doi:10.3803/EnM.2015.30.1.1

Recent surge of thyroid cancer, especially papillary thyroid carcinoma (PTC), ignited a debate on over-diagnosis of cancer. Such increase in incidence is a worldwide phenomenon, but it has been the most prominent in Korea. Although increased detection might have played a major role, some evidences suggest that true increase in incidence have also contributed to such phenomenon. PTC is a very common disease being the most common cancer in human. As the mortality due to PTC is relatively low, understanding pathophysiology of the disease and risk prediction in individual patient have particular importance for optimal management, but little has been known. I suggest a reason for such a commonality of PTC, and would like to describe my view on some aspects of PTC including unresolved issue on management based on our recent observations.
Humans ; Incidence ; Korea ; Mortality ; Thyroid Neoplasms*

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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):132-137. doi:10.3803/EnM.2012.27.2.132

BACKGROUND: In approach to an adrenal incidentaloma, early exclusion of pheochromocytoma is clinically important, due to the risk of catecholamine crisis. The aims of this study are to investigate the characteristics of incidentally detected pheochromocytomas, compared with that of the other adrenal incidentalomas, and to compare these characteristics with those of symptomatic pheochromocytomas. METHODS: In this retrospective study, we reviewed the medical records of 198 patients with adrenal incidentaloma from 2001 to 2010. We analyzed the clinical, laboratory and radiological data of pheochromocytomas, in comparison with those of the other adrenal incidentalomas. We also compared the characteristics of these incidentally detected pheochromocytomas with the medical records of 28 pathologically proven pheochromocytomas, diagnosed based on typical symptoms. RESULTS: Among the 198 patients with adrenal incidentaloma, nineteen patients were diagnosed with pheochromocytoma. Pheochromocytomas showed larger size and higher Hounsfield unit at precontrast computed tomography (CT) than did non-pheochromocytomas. All pheochromocytomas were larger than 2.0 cm, and the Hounsfield units were 19 or higher in precontrast CT. When both criteria of size > 2.0 cm and Hounsfield unit > 19 were met, the sensitivity and specificity for the diagnosis of pheochromocytoma were 100% and 79.3%, respectively. Compared with patients with pheochromocytoma, diagnosed based on typical symptoms, patients with incidentally detected pheochromocytoma were older, presented less often with hypertension, and showed lower levels of 24-hour urine metanephrine. CONCLUSION: Adrenal incidentaloma with < 2.0 cm in size or < or = 19 Hounsfield units in precontrast CT imaging was less likely to be a pheochromocytoma. Patients with incidentally discovered pheochromocytoma showed lower catecholamine metabolites, compared with those patients with symptomatic pheochromocytoma.
Adrenal Gland Neoplasms ; Adrenocortical Adenoma ; Humans ; Hypertension ; Medical Records ; Pheochromocytoma ; Retrospective Studies ; Sensitivity and Specificity

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The Association between Low Serum Bilirubin and Carotid Atherosclerosis in Subjects with Type 2 Diabetes.

Byoung Hyun PARK ; Hye Jung NHO ; Chung Gu CHO

Endocrinology and Metabolism.2012;27(2):126-131. doi:10.3803/EnM.2012.27.2.126

BACKGROUND: Bilirubin prevents oxidative modification of low density lipoprotein, and may protect vessels from atherosclerosis. Several studies showed an inverse relationship between serum bilirubin and coronary artery disease. However, there are some needs to clarify the relationship between serum bilirubin and carotid atherosclerosis in type 2 diabetes, especially. METHODS: A total of 346 type 2 diabetic patients, between 35 and 95 years of age (146 men and 200 women), were studied. Subjects with normal serum total bilirubin were divided into two groups, according to their serum total bilirubin levels (group I, total bilirubin > or = 1.0 mg/dL [n = 59]; group II, total bilirubin < or = 0.5 mg/dL [n = 76]). Carotid intima-media thickness (IMT) and plaque scores were measured by ultrasonography. Carotid atherosclerosis was defined by the presence of plaque or more than 1 mm of common carotid IMT. RESULTS: Carotid IMT was positively correlated with age, duration of diabetes and hypertension, high sensitive C-reactive protein (hs-CRP) and fibrinogen, but, it was negatively correlated with bilirubin, gamma glutaryltransferase, albumin, hemoglobin, cystatin C and estimated-glomerular filtration rate (GFR) in all subjects. After controlling for sex, age and levels of hemoglobin, direct bilirubin only was negatively correlated with carotid IMT (r = -0.151, P = 0.034). Low serum total bilirubin group had a lot of female, long duration of diabetes and hypertension, higher hs-CRP, platelet counts, serum creatinine, HbA1c and homeostasis model assessment-insulin resistance, lower albumin, hemoglobin, estimated-GFR and quantitative insulin sensitivity check index. Carotid IMT and plaque scores were significantly greater in low serum bilirubin group (0.785 +/- 0.210 mm vs. 0.678 +/- 0.146 mm, P < 0.01; 1.95 +/- 2.56 vs. 1.03 +/- 1.40, P < 0.05, respectively) than in the high serum bilirubin group. Multivariate logistic regression analysis showed that age, serum albumin and total bilirubin were independent associated factors for carotid atherosclerosis in type 2 diabetic women. CONCLUSION: Total bilirubin is inversely correlated with carotid atherosclerosis in type 2 diabetic patients, and it is an independent associated factor for carotid atherosclerosis in women.
Atherosclerosis ; Bilirubin ; C-Reactive Protein ; Carotid Arteries ; Carotid Artery Diseases ; Carotid Intima-Media Thickness ; Coronary Artery Disease ; Creatinine ; Cystatin C ; Diabetes Mellitus, Type 2 ; Female ; Fibrinogen ; Filtration ; Hemoglobins ; Homeostasis ; Humans ; Hypertension ; Insulin Resistance ; Lipoproteins ; Logistic Models ; Male ; Platelet Count ; Serum Albumin

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Differential Diagnostic Value of Total T3/Free T4 Ratio in Graves' Disease and Painless Thyroiditis Presenting Thyrotoxicosis.

Sang Min LEE ; Soo Kyoung KIM ; Jong Ryeal HAHM ; Jung Hwa JUNG ; Ho Su KIM ; Sungsu KIM ; Soon Il CHUNG ; Bong Hoi CHOI ; Tae Sik JUNG

Endocrinology and Metabolism.2012;27(2):121-125. doi:10.3803/EnM.2012.27.2.121

BACKGROUND: It is important to differentiate Graves' disease from that of painless thyroiditis in patients with thyrotoxicosis. In this study, we evaluated the usefulness of total T3 to free T4 ratio in making a differential diagnosis between Graves' disease and painless thyroiditis. METHODS: We reviewed medical records of thyrotoxic patients, who had been diagnosed with Graves' disease or painless thyroiditis, from October 2009 to July 2011. We assessed clinical characteristics, serum levels of total T3, free T4, thyroid stimulating hormone, thyrotropin-binding inhibitory immunoglobulin, and findings of 99mTechnetium thyroid scan. We analyzed the total T3/free T4 ratios between Graves' disease and painless thyroiditis patients. RESULTS: A total of 76 untreated thyrotoxic patients "49 Graves' disease and 27 painless thyroiditis" were examined. The total T3, free T4 levels and the total T3/free T4 ratios were significantly higher in patients with Graves' disease than in those with painless thyroiditis (P < 0.001). In the total T3/free T4 ratio > 73, the possibility of Graves' disease was significantly higher than in painless thyroiditis (sensitivity, 75.5%; specificity, 70.3%). The sensitivity and specificity of the total T3/free T4 ratio in patients with free T4 < 3.6 ng/dL have been increased (sensitivity, 100%; specificity, 71.4%). CONCLUSION: The total T3/free T4 ratios was useful for making a differential diagnosis between Graves' disease and painless thyroiditis.
Diagnosis, Differential ; Graves Disease ; Humans ; Immunoglobulins ; Immunoglobulins, Thyroid-Stimulating ; Medical Records ; Sensitivity and Specificity ; Thyroid Gland ; Thyroiditis ; Thyrotoxicosis ; Thyrotropin

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A Case of Asymptomatic Giant Cystic Pheochromocytoma.

Sang Hoon LEE ; Seungkoo LEE ; Sang Wook KIM ; Eun Hee CHO

Endocrinology and Metabolism.2012;27(2):119-120. doi:10.3803/EnM.2012.27.2.119

No abstract available.
Pheochromocytoma

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Characterization of Incidentally Detected Adrenal Pheochromocytoma.

Soon Jib YOO ; Woohyeon KIM

Endocrinology and Metabolism.2012;27(2):116-118. doi:10.3803/EnM.2012.27.2.116

No abstract available.
Pheochromocytoma

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AMP-activated protein kinase Activating Agent and Its Implication.

Hyoung Chul CHOI

Endocrinology and Metabolism.2012;27(2):109-115. doi:10.3803/EnM.2012.27.2.109

AMP-activated protein kinase (AMPK) is an important cellular fuel sensor. Activation of AMPK requires phosphorylation at threonine (Thr)-172, which resides in the activation loop of the alpha1 and alpha2 subunits. Several AMPK upstream kinases are capable of phosphorylating AMPK at Thr-172, including LKB1 and CaMKKbeta. AMPK has been implicated in the regulation of physiological signals, such as inhibition of cholesterol, fatty acid, protein synthesis, and enhancement of glucose uptake and blood flow. AMPK activation also exhibits several salutary effects on vascular function and improves vascular abnormalities. AMPK is activated by numerous drugs and xenobiotics. Some of these are in clinical use for the treatment of type 2 diabetes (e.g., metformin and thiazolidinediones), hypertension (e.g., nifedipine and losartan), and impaired blood flow (e.g., aspirin, statins, and cilostazol). Plant-derived xenobiotics or nutraceuticals that were claimed to have health benefits in diabetes or cancer have been reported to activate AMPK. These include resveratrol from red wine, epigallocatechin gallate from green tea, capsaicin from peppers, berberine, which is a yellow dye of the genus berberis, genistein from soy bean, and ginsenoside from ginseng panax. AMPK is also modulated by numerous hormones and cytokines that regulate energy balance at the whole body level, including leptin, adiponectin, ghrelin, and even thyroid hormones. This work shows that the precise mechanisms of AMPK kinase and AMPK interaction.
Adiponectin ; AMP-Activated Protein Kinases ; Aspirin ; Berberine ; Berberis ; Calcium-Calmodulin-Dependent Protein Kinase Kinase ; Capsaicin ; Catechin ; Cholesterol ; Cytokines ; Dietary Supplements ; Genistein ; Ghrelin ; Glucose ; Hypertension ; Insurance Benefits ; Leptin ; Metformin ; Nifedipine ; Panax ; Phosphorylation ; Phosphotransferases ; Protein Kinases ; Soybeans ; Stilbenes ; Tea ; Threonine ; Thyroid Hormones ; Wine ; Xenobiotics

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New Onset Diabetic Ketoacidosis Associated with Quetiapine.

Soo Hyoung LEE

Endocrinology and Metabolism.2010;25(3):231-235. doi:10.3803/EnM.2010.25.3.231

New onset diabetes and diabetic ketoacidosis have been reported with administering atypical antipsychotics. Whereas clozapine and olanzapine are associated with a relatively high incidence of new onset diabetes and diabetic ketoacidosis, there are few case reports that have has been documented implicating quetiapine as the contributor to causing diabetes and diabetic ketoacidosis. I report here on a case of diabetic ketoacidosis that developed in a patient who was associated with quetiapine therapy. A 32-year-old woman with schizophrenia was transferred to the emergency room with diabetic ketoacidosis and vaginal bleeding. Seventeen months before this episode, she was hospitalized in an inpatient psychiatric institution and treated with quetiapine 1200mg, haloperidol 3mg, diazepam 5mg and benztropine 3mg with normal blood glucose levels. She had no personal and familial history of diabetes mellitus. She had no risk factors for diabetes mellitus and she also had no precipitating factor for diabetic ketoacidosis except for taking the atypical antipsychotic quetiapine. I believe that this case is the first case report of quetiapine associated diabetic ketoacidosis in Korea. Considering the unpredictability of hyperglycemia associated with quetiapine, monitoring the blood glucose should be part of the routine care when administering quetiapine.
Adult ; Antipsychotic Agents ; Benzodiazepines ; Benztropine ; Blood Glucose ; Clozapine ; Diabetes Mellitus ; Diabetic Ketoacidosis ; Diazepam ; Dibenzothiazepines ; Emergencies ; Female ; Haloperidol ; Humans ; Hyperglycemia ; Incidence ; Inpatients ; Korea ; Precipitating Factors ; Risk Factors ; Schizophrenia ; Uterine Hemorrhage ; Quetiapine Fumarate

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Intrathyroidal Metastasis of Lung Adenocarcinoma Presenting as Subacute Thyroiditis.

Hyun Sung SHIN ; Young Kwang CHOO ; Won Ae LEE ; Hyun Kyung CHUNG

Endocrinology and Metabolism.2010;25(3):226-230. doi:10.3803/EnM.2010.25.3.226

One of the rare diseases for differential diagnosis of subacute thyroiditis is metastases within the thyroid gland. We report here on a 72-year-old-woman with painful goiter and signs of hyperthyroidism. Her serum concentration of thyroid hormone was in the upper limit of normal, and the uptake of radioactive iodine by the thyroid was completely depressed. Although subacute thyroiditis was suspected, an additional work up that included a chest CT scan was done for the combined cough and chronic weakness. The result was lung cancer with metastatic involvement of the thyroid and multiple lymph nodes. She refused further anti-cancer therapy and died 5 months after the diagnosis. For the differential diagnosis of such a rare case, careful examination is important even in patients with the typical symptoms and laboratory findings of subacute thyroiditis.
Adenocarcinoma ; Cough ; Diagnosis, Differential ; Goiter ; Humans ; Hyperthyroidism ; Iodine ; Lung ; Lung Neoplasms ; Lymph Nodes ; Neoplasm Metastasis ; Rare Diseases ; Thorax ; Thyroid Gland ; Thyroiditis, Subacute

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A Case of Pseudohypoparathyroidism with Graves' Disease.

Gil Woo LEE ; Jae Hoon KIM ; Kang Won LEE ; Sa Il KIM ; Sang Mo HONG ; Dong Sun KIM ; Woong Hwan CHOI ; You Hern AHN ; Tae Wha KIM

Endocrinology and Metabolism.2010;25(3):221-225. doi:10.3803/EnM.2010.25.3.221

Pseudohypoparathyroidism is a rare disease that is characterized by target cell resistance to the effects of parathyroid hormone and this disease is classified into various types depending on the phenotypic and biochemical findings. The patients with pseudohypoparathyroidism present with the clinical and biochemical features of hypoparathyroidism, but they have an increased serum level of parathyroid hormone. We experienced a case of pseudohypoparathyroidism in a 24 years old woman who had Graves' disease at that time. She had hypocalcemia, hyperphosphatemia, an elevated serum parathyroid hormone level and a normal urinary basal cyclic AMP(adenosine monophosphate) level. She also had a normal phenotypic appearance. Therefore, she was classified as suffering with pseudohypoparathyroidism type II. The clinical and laboratory abnormalities were improved by calcium supplementation in addition to vitamin D. To the best of our knowledge, this is the first case of pseudohypoparathyroidism combined with Graves' disease in Korea.
Calcium ; Female ; Graves Disease ; Humans ; Hyperphosphatemia ; Hyperthyroidism ; Hypocalcemia ; Hypoparathyroidism ; Korea ; Parathyroid Hormone ; Pseudohypoparathyroidism ; Rare Diseases ; Stress, Psychological ; Vitamin D

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