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 a tumor or growth of abnormal cells on the skin, which is your bodyâs largest organ. These tumors can be benign (noncancerous) or malignant (cancerous). There are three types of skin cancer: Basal cell carcinoma is the most common type. It typically occurs on the surface layer of your skin.