M e t h o d s Data sources: MEDLINE, EMBASE/ Excerpta Medica, CINAHL, and LILACS to May 2006; Cochrane Library (2006, Issue 1); Current Controlled Trials; references of relevant studies and systematic reviews; experts; and pharmaceutical companies. Study selection and assessment: Randomized controlled trials (RCTs) that compared thyroid hormone replacement therapy (triiodothyronine [T3], thyrox...

Subclinical hypothyroidism is defined as an increased serum TSH in the presence of a normal serum FT4 concentration. Increased refers to values above and normal to values within population-based reference ranges of these hormones. It is however not so simple to diagnose accurately subclinical hypothyroidism in day-to-day practice applying this biochemical definition. Diagnosis of subclinical hy...

OBJECTIVES Both hyperthyroidism and overt hypothyroidism are associated with increased prevalence of metabolic syndrome and its components, while data on subclinical hypothyroidism is currently limited especially in working populations. The aim of this study was to examine the association between subclinical hypothyroidism and metabolic syndrome components in workers; and to evaluate whether th...

Thyroid hormones play an important role in regulating different metabolism functions and multiple organs' performance. Changes in the thyroid hormone axis can lead to profound effects on the stability of vital organs and systems, especially the cardiovascular system. Hypothyroidism is classified according to the clinical presentation as overt and subclinical. There is some evidence supporting t...

Vitamin D deficiency has been implicated in various diseases including cancer and auto immune diseases. The present study attempts to establish a relation between vitamin D deficiency, thyroid hormones and TSH in subclinical hypothyroidism.100 newly diagnosed patients with subclinical hypothyroidism were divided into three groups according to vitamin D levels. Mean plasma TSH and T3 values decr...

OBJECTIVES We investigated the frequency of hypothyroidism in patients treated with total laryngectomy, hemithyroidectomy-isthmectomy, and postoperative radiotherapy for T3 or T4 larynx cancers. PATIENTS AND METHODS Twenty-nine male patients (mean age 54 years; range 43 to 72 years) with T3 or T4 larynx cancers were prospectively included in the study. Preoperatively, thyroid function tests w...

BACKGROUND Association of thyroid dysfunction (TD) with interferon treatment of HCV is well known to clinicians. However, a few studies have highlighted the role of hepatitis C virus per se in the development of TD. The aim of this study was to know the prevalence of TD in non-interferon treated HCV infected patients referred for thyroid function testing. PATIENTS AND METHODS Among 557 ELISA-...

Clinical aspects, laboratory investigation, and treatment of hyperthyroidism and hypothyroidism are reviewed in light of recent information. Special circumstances, such as hyperthyroidism during pregnancy, Graves ophthalmopathy, iodine-induced hyperthyroidism, and subclinical hypothyroidism, are also considered.