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.
There are three main types of skin cancer: squamous cell carcinoma, basal cell carcinoma, and melanoma. Your skin has multiple layers: the upper, protective layer of the skin is known as the epidermis.his cancer is caused by mutations in the DNA of these cells, which cause them to multiply uncontrollably. According to the Skin Cancer Foundation, SCC is the second most common form of skin cancer.