INTRODUCTION The use of radionuclides for evaluating thyroid conditions in cats is well documented. Hyperthyroidism is the most common indication. A feature of hyperthyroidism is an increased uptake of radionuclide. The radionuclides most frequently used for thyroidal imaging are I, I, and the pertechnetate ion of technetium (TcO4). The radioisotopes of iodine are exclusively taken up by the th...

OBJECTIVE: Diabetes mellitus and thyroid disease are the two common endocrinopathies seen in adult population. Studies to evaluate thyroid disorders in patients with type 2 diabetes are lacking. The aim of this study was to compare prevalence of thyroid dysfunction and autoim-munity in type 2 diabetic patients with age and sex matched non-diabetic control group. MATERIAL AND METHODS: Among pat...

BACKGROUND/AIM To determine the prevalence of malignancy in thyroid incidentalomas (TIs) detected by fluorine-18 fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT). MATERIALS AND METHODS 18F-FDG PET/CT images were evaluated prospectively for the presence of thyroid uptake. The patients with a TI were evaluated by an endocrinologist according to the predefin...

Differentiated thyroid cancers and their metastases frequently exhibit reduced iodide uptake, impacting on the efficacy of radioiodine ablation therapy. PTTG binding factor (PBF) is a proto-oncogene implicated in the pathogenesis of thyroid cancer. We recently reported that PBF inhibits iodide uptake, and have now elucidated a mechanism by which PBF directly modulates sodium iodide symporter (N...

Most of the studies have shown a higher risk for subclinical and clinical hypothyroidism, antithyroid autoantibodies [overall antithyroid peroxidase antibodies (TPOAb)], and in general, thyroid autoimmunity, overall in the female gender in patients with sarcoidosis (S). A significantly higher prevalence of clinical hypothyroidism and Graves' disease was also described in female S patients with ...

Inappropriate responsiveness of the stress system may cause numerous alterations in endocrine, metabolic and autonomic systems. Many studies have been carried out on the effects of acute stress on thyroid function but the effects of chronic stress have not been fully investigated. The purpose of this study is to evaluate the effects of long term handling stress on thyroid function. Study was pe...

Na+/I- symporter (NIS) mediates iodide (I-) uptake in the thyroid gland, the first and rate-limiting step in the biosynthesis of the thyroid hormones. The expression and function of NIS in thyroid cells is mainly regulated by TSH and by the intracellular concentration of I-. High doses of I- for 1 or 2 days inhibit the synthesis of thyroid hormones, a process known as the Wolff-Chaikoff effect....

A case of follicular thyroid cancer with intense focal Methionine uptake on 11C-Methionine PET/CT is reported here. The use of 11C-Methionine PET in differentiated thyroid cancer is currently being investigated as a surrogate tracer compared to the more widely used 18F-FDG PET. This case illustrates the potential incremental value of this modality, not only in the localizing of parathyroid aden...

OBJECTIVE: Due to the increased prevalence of thyroid dysfunction in subjects with type 2 diabetes and also this fact that antibodies could potentially identify subjects at risk of thyroid dysfunction, this study was conducted to investigate thyroid autoimmunity in type 2 diabetic patients. MATERIAL AND METHODS: Among patients referred to Yazd Diabetes Research Center, 4000 type 2 diabetic pat...

We compared the specificities of transport mechanisms for uptake and efflux of thyroid hormones in cells of the human choriocarcinoma cell line, JAR, to determine whether triiodothyronine (T3), thyroxine (T4) and reverse T3 (rT3) are carried by the same transport mechanism. Uptake of 125I-T3, 125I-T4 and 125I-rT3 was saturable and stereospecific, but not specific for T3, T4 and rT3, as unlabell...