Prospective Observation of 5-Year Clinical Course of Subclinical Hypothyroidism in Korean Population

Subclinical hypothyroidism (SCH) is a common clinical condition, whereas it's natural course has not been identified distinctly. We evaluated the natural history of 169 SCH patients over 5-yr and the prognostic factors including thyroid autoantibodies and thyroid ultrasonographic (USG) findings related to develop overt hypothyroidism. After 5 yr, 47.3% of patients showed normalization of TSH, while 36.7% of patients remained persistence of high level of TSH, and overt hypothyroidism developed in 11.2% of patients. There were painless thyroiditis (2.9%) and hyperthyroidism (1.7%) during 5 yr follow-up. The thyroid nodule was seen in 48.6% of patients. Most of patients had 1 to 2 nodules whereas only 3% of patients with thyroid nodule had more than 6 nodules. Overt hypothyroidism patients had more heterogenous echogenecity in USG compared to patients with normalization or persistent SCH (76.5% vs 50.0% vs 35.0%, P = 0.048) and higher prevalence positive anti-thyroid peroxidase (anti-TPO Ab) and anti-thyroglobulin antibody (anti-Tg Ab) and titer of anti-TPO Ab than other two groups. The cut off values for prediction of overt hypothyroidism were TSH > 7.45 microIU/mL, free T4 560 IU/mL. SCH has various courses and initial TSH, free T4, presence of thyroid autoantibody, titer of thyroid autoantibody; and thyroid USG findings can serve as a prognostic factor for progression of overt hypothyroidism. These parameters suggest consideration to initiate thyroid hormone treatment in SCH.

A Case of Lingual Thyroid Treated by 131I Ablation

A lingual thyroid is a rare developmental anomaly caused by the failure of the descent of the thyroid gland anlage early in the course of embryogenesis. The incidence of lingual thyroid has been reported to be 1/100,000. Lingual thyroid is often asymptomatic but may cause dysphagia, dysphonia, upper airway obstruction and hemorrhage. In this report, we described the case of a 50-year-old women experiencing lingual thyroid who had subclinical hypothyroidism. She underwent successful 131I ablation and has done well on thyroid hormone replacement therapy.

A Case of Cholethorax Developed by Unknown Cause / 결핵및호흡기질환

Cholethorax is a bilious pleural effusion caused by a pleurobiliary fistula or leakage of bile into the pleural space. Most cases of cholethorax arise from a complication of abdominal trauma, hepatobiliary infection, or invasive procedures or surgery of hepatobiliary system. However, we experienced a case of a patient with cholethorax of unknown origin. There was no evidence of pleurobiliary fistula or leakage of bile from the hepatobiliary system although we examined the patient with various diagnostic tools including chest and abdominal computed tomography, endoscopic retrograde cholangiopancreatography, tubography, bronchofiberscopy, hepatobiliary scintigraphy and video-assisted thoracoscopic surgery. Herein we report a case of cholethorax for which the specific cause was not identified. The patient was improved by percutaneous drainage of pleural bile.

A Case of Cushing's Disease in Pregnancy

Developing Cushing's syndrome during pregnancy is rare because menstruation is irregular and hypercortisolism causes infertility. Developing Cushing's disease during pregnancy is very rare because there is even less ovulation than those with the adrenal adenoma. The clinical manifestations of Cushing's syndrome may easily be missed during pregnancy as the features of weight gain, hypertension, and hyperglycemia overlap with those that occur during a pregnancy. Diagnosing Cushing's syndrome during a pregnancy is complex because the biochemical features are obscured by the natural changes in the hypothalamic-pituitary-adrenal axis that occur during pregnancy. Having Cushing's syndrome during a pregnancy results in increased fetal and maternal complications, so early diagnosis and treatment are critical. We report the clinical and endocrine findings of a pregnant women with Cushing's disease who underwent transsphenoidal surgery after delivery.

Pulmonary Lipiodol Embolism after Transcatheter Chemoembolization for Hepatocellular Carcinoma / 결핵및호흡기질환

Pulmonary lipiodol embolism is a rare but very fatal complication of transcatheter arterial chemoembolization (TACE), Here we present the case of an unusual complication of TACE in a 67-year-old man who presented with dyspnea, hemoptysis, and a history of a third session of TACE for hepatocellular carcinoma (HCC) that had been performed 3 days prior to presenting. On the basis of chest X-ray and computed tomography (CT) scan findings, we diagnosed pulmonary lipiodol embolism. He was conservatively treated with oxygen and haemostatic agents. The patient recovered quickly without any significant sequela and was discharged.