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 cancers are malignant growths on the skin. They mostly arise from the upper layer of the skin â epidermis. Skin cancers may develop anywhere on the skin, including the scalp, lips or under-nail skin. Skin cancers are most common after 50 years of age, but they may occur at any time.