Alaska's Western Arctic Caribou herd forms aggregations or groups that can stretch for miles. The herd is on a three-year census schedule. The Department attempted a census during July 2002 but high wind, snow and fog forced a one-year delay. Weather almost prevented the 2003 attempt as well.
Finally, thyroid cancer may also be detected as a cause of an enlarged thyroid gland. It is quite clear that enlargement of the thyroid or the presence of nodules within the thyroid is common, particularly as revealed when sensitive imaging techniques such as ultrasound are used.
Causes of hypothyroidism include: 1  Hashimoto's thyroiditis: In this autoimmune disorder, the body attacks thyroid tissue. 2  The tissue eventually dies and stops producing hormones. 3  Removal of the thyroid gland: The thyroid may have been surgically removed or chemically destroyed.he most common thyroid problems involve abnormal production of thyroid hormones. Too much thyroid hormone results in a condition known as hyperthyroidism.