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.
While melanoma is the most widely known and aggressive form of skin cancer, itâs actually the rarest type. Non-melanoma skin cancers, such as squamous cell carcinoma and basal cell carcinoma, are the most common forms of skin cancer.