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 tumors. Skin tumors: Introduction. Skin tumors: Skin tumors is a condition in which there is a mass or abnormal growth of cells on the skin. See detailed information below for a list of 4 causes of Skin tumors, Symptom Checker, including diseases and drug side effect causes. Â» Review Causes of Skin tumors: Causes | Symptom Checker Â».