SIADH occurs when body produces excessive antidiuretic hormone (ADH). ADH helps regulate water loss through urine and maintain electrolyte balance. Excessive ADH causes water retention and hyponatremia
Thyroid gland produces insufficient thyroid hormone. Thyroid controls metabolism and affects body functions. Symptoms include fatigue, weight gain, and cold sensitivity
Endocrine system controls almost all body functions through hormone production. Glands release hormones into bloodstream to coordinate processes. System affects metabolism, growth, development, emotions, and sleep
Hyperparathyroidism occurs when parathyroid glands produce excessive parathyroid hormone. Parathyroid glands are located behind thyroid, about size of rice grain. Hormone regulates calcium and phosphorus levels in bloodstream
Autoimmune disorder causing hyperthyroidism affecting nearly 1 in 100 Americans. Immune system attacks thyroid gland, producing excessive hormones. Thyroid controls body's energy use and affects nearly every organ
Test measures cortisol secretion suppression by adrenal gland. Two types: low-dose (1mg/day) and high-dose (8mg/day). Can be done overnight or standard (3-day) method