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 when the skin cells begin to abnormally grow beyond the normal boundaries of their design. Any abnormal growth of skin cells is considered skin cancer, but only two are considered malignant. Skin cancer can be categorized into 3 main types: Basal cell carcinoma. Squamous cell carcinoma. Melanoma.