PTH controls calcium and phosphorus levels in the blood. PTH is made by the parathyroid glands, which are four pea-sized glands that lie behind the thyroid gland. If the blood calcium level is too low, the parathyroid glands release more PTH.
Skin cancer is a cancer of the cells in the outermost layer of skin, called the epidermis. The epidermis itself has three layers: an upper and middle layer made up of squamous cells, and a bottom layer made up of melanocytes and basal cells.
Skin Cancer Treatments. Skin cancer is the most common of all cancers. It affects more than 2 million Americans every year. Skin cancer is a growth on the skin that occurs when cells grow abnormally. It occurs most commonly on areas of the skin that are exposed to the sun, like the neck, arms, and face. If the growth continues unchecked, it can spread to other parts of the body through the blood stream or lymphatic system.