Hashimoto's Thyroiditis. Also called Hashimoto's disease, Hashimoto's thyroiditis is an autoimmune disease, a disorder in which the immune system turns against the body's own tissues. In people with Hashimoto's, the immune system attacks the thyroid.
According to the U.S. Census Bureau, the county has a total area of 4,751 square miles (12,310 km 2), of which 4,058 square miles (10,510 km 2) is land and 693 square miles (1,790 km 2) (15%) is water.
Los Angeles County has 75 miles of coastline and altitudes ranging from 9 feet below sea level at Wilmington to 10,080 feet above sea level atop Mt. San Antonio. Area Rivers include the Los Angeles, Rio Hondo, San Gabriel, and Santa Clara rivers.