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.
Causes of Skin Cancer. Skin cancers are malignant growths (malignant tumours or malignant neoplasms), which usually present on the epidermis (the outer layer of skin), though can occur in other areas of the body such as inside the mouth, nose and on the nailbeds.auses of Skin Cancer. Skin cancers are malignant growths (malignant tumours or malignant neoplasms), which usually present on the epidermis (the outer layer of skin), though can occur in other areas of the body such as inside the mouth, nose and on the nailbeds.