Thyroid often carcinomas, although cancer can occur in any tissue that the thyroid consists of, including cancer of C-cells and lymphomas. Cancers from other sites also rarely lodge in the thyroid. Radiation of the head and neck presents a risk factor for thyroid cancer, and cancer is more common in women than men, occurring at a rate of about 2:1. In most cases, thyroid cancer presents as a painless mass in the neck. It is very unusual for thyroid cancers to present with other symptoms, although in some cases cancer may cause hyperthyroidism. Most malignant thyroid cancers are papillary, followed by
Desiccated thyroid extract Desiccated thyroid extract Desiccated thyroid or thyroid extract refers to porcine or bovine thyroid glands, dried and powdered for therapeutic use. Animal extract thyroid preparations were developed in the late 19th century, and are still in use today for the treatment of hypothyroidism. This product is sometimes referred to as "natural thyroid", "natural thyroid hormones", "pork thyroid", thyroid USP, thyroid BP, or by the name of a commercial brand, such as "Armour Thyroid" , "NP Thyroid" or "Nature-Throid" & "Westhroid". Desiccated thyroid has been described in the United States Pharmacopoeia for a century as "the cleaned, dried, and powdered thyroid