Endocrine Abstracts

Background: Selenium is an important trace element for thyroid hormone metabolism and its deficiency can cause hypothyroidism. Serum or plasma selenium concentration has been known as best biomarker which reflects selenium intake and reserve. We preliminarily assessed the serum or urine selenium concentrations in patients with thyroid disease compared to healthy normal population. We also investigated the correlation of serum selenium concentration with urine selenium concentr...

Background: Three deiodinase genes (DIO) play an important role in thyroid hormone metabolism. Among them, type 2 iodothyronine deiodinase (DIO2) converts T4 to T3 in brain and impaired psychological well-being was reported in minor variants of DIO2. However, the prevalence of three DIOs and their relation to neuropsychological status has not been evaluated in Asian hypothyroid subjects.Methods: We prospectively enrolled 196 subjects who were taking levo...

Background: We evaluated the impact of several anthropometric parameters on serum peak TSH levels after standard two-dose of recombinant human thyrotropin (rhTSH) injection and assessed the usefulness of repeated measurement of TSH and thyroglobulin (Tg) levels at 24 and 72 h after rhTSH injection (Day 3 and 5) to confirm stimulated Tg level.Methods: We retrospectively reviewed 270 differentiated thyroid carcinoma patients who underwent rhTSH stimulation...

Introduction: Mild hypercalcaemia can present in 10–15% of hyperthyroid patients. In contrast, its incidence in B cell lymphoma is considerably less (7–8%) but its levels are much higher. We report a patient with hypercalcemia secondary to both thyrotoxicosis and lymphoma.Case report: A 55 year-old lady presented with non specific symptoms of appetite loss and lower limb weakness. Comorbidities included hypertension, diabetes mellitus, hyperlip...

Introduction: One of the main challenges in the management of male hypogonadotropic hypogonadism (HH) is in the restoration of fertility. We describe 2 patients with HH and discuss the difficulties involved in their management.Case (1): A 23-year-old Chinese man presented with lack of secondary sexual characteristics. Examination revealed Tanner Stage 2 with descended testes measuring 6 ml bilaterally. Laboratory results: total testosterone (TT) <1 n...

Introduction: This study aimed to examine whether altered Heart Rate Variability (HRV) could predict the risk of development of metabolic syndrome (MetSD) in Asians.Methods: We investigated health checkup records of 33 752 adults aged 20–65 years old who did health checkups and HRV measurement between April 2011 and June 2014 at Kangbuk Samsung Hospital, without MetSD, anemia, thyroid disease, malignancy, and heart disease. A 3-minute HRV recording ...

Object: The natural history and proper algorithm for follow-up testing of nonfunctioning pituitary adenomas (NFPAs) are not well known, despite their relatively high prevalence. The aim of this study was to suggest the optimal follow-up algorithm for NFPAs, based on the natural history.Methods: We followed up on 197 patients with NFPAs without any treatment (including surgery and radiation) at the time of detection, in a single center, between March 2000...

Background: The association between thyroid cancer and skeletal outcomes has not been thoroughly investigated. We aimed to investigate the risk of osteoporotic fractures in patients with thyroid cancer compared with a matched control group.Methods: This retrospective cohort study included 2,514 patients with thyroid cancer and 75,420 matched controls from the Korean National Health Insurance Service-National Sample Cohort (NHIS-NSC, 2006-2019). Rates of ...

Context: Thyroid eye disease is disabling and disfiguring and has a substantial negative impact on quality of life. Medical therapies to reduce inflammation are widely used, but there is limited data from clinical trials beyond 6 months of follow-up. Methods: 3 year follow-up of a subset of the CIRTED trial (n = 68) which randomized patients to receive high-dose oral steroid with azathioprine/placebo and radiotherapy/sham radiotherapy. We compar...

Background: There is no existing longitudinal study to support ethnicity-specific and body mass index (BMI) category-specific waist circumference (WC) thresholds and their potential clinical utility to assess the risk of obesity-related diseases.Methods: We performed a prospective assessment of 5,852,702 subjects in large-scale population-based cohort dataset obtained from the Korea National Health Insurance System. BMI was categorized into 6 subgroups (...