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Subject: search.filters.subject.Hypothyroidism

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    The Association between Subclinical Hypothyroidism and Epicardial Adipose Tissue Thickness
    (KOREAN SOC CARDIOLOGY, 2015-01-01) Belen, Erdal; Degirmencioglu, Aleks; Zencirci, Ertugrul; Tipi, Fatih Fahri; Altun, Ozgur; Karakus, Gultekin; Helvaci, Aysen; Zencirci, Aycan Esen; Kalaycioglu, Ezgi
    Background and Objectives: Subclinical hypothyroidism (SH) is considered to be a potential risk factor for cardiovascular disease. Epicardial adipose tissue (EAT) thickness is also closely related to cardiovascular disorders. The aim of this study was to evaluate whether SH is associated with higher EAT thickness. Subjects and Methods: Fifty-one consecutive patients with SH and 51 healthy control subjects were prospectively enrolled into this trial. Thyroid hormone levels, lipid parameters, body mass index, waist and neck circumference, and EAT thickness measured by echocardiography were recorded in all subjects. Results: Mean EAT thickness was increased in the SH group compared to the control group (6.7 +/- 1.4 mm vs. 4.7 +/- 1.2 mm, p<0.001). EAT thickness was shown to be correlated with thyroid stimulating hormone level (r=0.303, p=0.002). Multivariate logistic regression analysis revealed that EAT thickness was independently associated with SH \{odds ratio (OR): 3.87, 95\% confidence interval (Cl): 1.92-7.78, p<0.001
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    V30 as a predictor for radiation-induced hypothyroidism: a dosimetric analysis in patients who received radiotherapy to the neck
    (BIOMED CENTRAL LTD, 2014-01-01) Akgun, Zuleyha; Atasoy, Beste M.; Ozen, Zeynep; Yavuz, Dilek; Gulluoglu, Bahadir; Sengoz, Meric; Abacioglu, Ufuk
    Introduction: The purpose of this study is to evaluate the possible predictors of thyroid disorders after neck radiotherapy, with a focus on radiation dose-volume factors. Methods: Thyroid function was measured in 100 patients who had received radiotherapy to the neck, including the thyroid. All radiation-induced thyroid dysfunctions were determined with an endpoint of abnormal thyroid stimulating hormone (TSH), free triiodothyronine (fT3) and thyroxine (fT4) and thyroid peroxidase antibodies and (TPA). The total volume of the thyroid, mean radiation dose to the thyroid (Dmean) and thyroid volume percentage that received radiation doses of 10-50 Gy (V10-V50) were calculated in all patients. The evaluated risk factors for thyroid dysfunction included dose-volume parameters, sex, age, previous surgery, chemotherapy and comorbidity. Results: There were 52 patients with hypothyroidism and V30 (p = 0.03), thyroid volume (p = 0.01) and Dmean (p = 0.03) appeared to be correlated with hypothyroidism in univariate analysis. However, there was not association found in multivariate analysis for these factors. Conclusions: Thyroid disorders after radiation therapy to the neck still represent a clinically underestimated problem. V30 may be a useful tool for evaluating the risk of hypothyroidism when determining an individual patient's treatment.