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 is the most common of all cancers. Between 40 to 50% of all cancer cases diagnosed every year are skin cancer. There are two main types of skin cancer: malignant melanoma and nonmelanoma skin cancer. Nonmelanoma Skin Cancer-The the most common types are basal cell carcinoma and squamous cell carcinoma.