Answer Wiki. ' denotes foot,  denotes inches, where 1 foot is equivalent of 12 inches (though I'm not American and I generally don'thave any idea how to work with US customary units, it really had quite an interesting history as the number 12 was used for conversion by many countries, including Ancient Rome). So that'd be 5 * 12 + 6 = 60 + 6 = 66 inches.
Graves' Disease. The most common cause of hyperthyroidism is Graves' disease. This is an autoimmune disorder that attacks the thyroid gland and triggers the release of high levels of thyroid hormones. One of the hallmarks of Graves' disease is a visible and uncomfortable swelling behind the eyes.
Causes and symptoms. Hypothyroidism is most often the result of Hashimoto's disease, also known as chronic thyroiditis (inflammation of the thyroid gland). In this disease, the immune system fails to recognize that the thyroid gland is part of the body's own tissue and attacks it as if it were a foreign body. The attack by the immune system impairs thyroid function and sometimes destroys the gland. Other causes of hypothyroidism include: Radiation.