View clinical trials related to Hypothyroidism.
Filter by:The purpose of this study is to determine whether treating women, who are diagnosed with a mild imbalance of thyroid hormones during pregnancy, with thyroid hormone replacement affects their children's intellectual development at 5 years of age.
The purpose of this study is to determine whether a body weight adjusted dose of thyroxin is superior to treatment guided by laboratory results of thyroxin hormones in patients with central hypothyroidism. Moreover beneficial effects of triiodthyronine supplementation are investigated.
RATIONALE: Learning about thyroid dysfunction in patients with breast cancer may help plan treatment and may help patients live more comfortably. PURPOSE: This clinical trial is studying how often thyroid dysfunction happens in women with newly diagnosed stage I, stage II, or stage III breast cancer who are planning to undergo chemotherapy compared to how often it happens in healthy volunteers.
To date, there have been no comprehensive studies on swallowing function in patients undergoing surgery for multinodular goiter. We hypothesize that 1. Multinodular goiter has significant effect on swallowing function in symptomatic and asymptomatic patients, which can be demonstrated by a standardized questionnaire and a formal swallowing evaluation and 2. Surgery will improve swallowing function as measured post-operatively by these same parameters. Patients with multinodular goiter will be asked to fill out a validated survey (SWAL-QOL) on swallowing function in addition to undergoing a formal swallowing evaluation before and after surgery for multinodular goiter (subtotal thyroidectomy) and compared to patients undergoing total thyroidectomy for follicular cancer and less extensive thyroid surgery for other benign processes (lobectomy or lobectomy plus isthmusectomy).
To examine the association of subclinical hypothyroidism and risk of myocardial infarction and stroke in a large prospective cohort of post-menopausal women.
To assess the association of immunogenetic factors with onset of coronary heart disease and the interrelationship of these factors with standard coronary heart disease risk factors.
Thyroid cancer is typically treated with surgery, radiation or a combination of both. Following surgical removal of thyroid tissue patients receive thyroid hormone replacement medication. In addition patients undergo tests to determine the status of the disease. One of the tests conducted is a whole body scan using radioactive iodine to detect and locate any remaining cancerous thyroid tissue. Thyroid tissue uses iodine to make thyroid hormones (T3 and T4). In order for a radioiodine scan to work, cancerous thyroid tissue must be "hungry" for iodine. Thyroid stimulating hormone (TSH) produced in the pituitary gland is responsible for making thyroid tissue "hungry" for iodine. Once thyroid tissue absorbs the radioactive iodine it will be clearly visible on the scan and can be located for removal. However, thyroid hormone replacement medication tends to lower the activity of the pituitary gland and the amount of naturally produced TSH. So it is necessary to stop thyroid hormone replacement to increase TSH. A problem arises when there is a lack of thyroid hormone replacement causing patients to experience hypothyroidism. This condition is associated with unpleasant physical and emotional symptoms. TSH has been created in a laboratory and called Thyrogen. It is basically the same as the TSH produced in the human pituitary gland. However, Thyrogen increases the level of TSH in the body without having to stop thyroid replacement medication. Therefore patients will not experience hypothyroidism while preparing for a radioactive iodine scan. The objective of this study is to compare the activity of radioiodine (131I) in patients taking Thyrogen with normal thyroid activity versus patients with hypothyroid activity after thyroid replacement medication is withdrawn. In addition the study will provide information on how radioactive iodine is eliminated from the body. The study will help researchers understand how to give Thyrogen and radioiodine for purposes of scanning and therapeutic ablation (the destruction of function) of cancerous thyroid tissue. The study will accept patients with non-medullary thyroid cancer who are preparing for ablation therapy. The patients will be placed in one of two groups. Group one will receive Thyrogen in 2 doses 24 hours apart. Group two will receive Thyrogen in 3 doses 72 hours apart. The patients will undergo two 131I whole body scans: one after Thyrogen while taking thyroid hormone suppressive and the second after withdrawal from thyroid hormone. 131I ablative therapy will be given under hypothyroid conditions at the completion of the study.