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 a disease in which cancerous cells develop in your skinâs tissues. Skin cancer is the most common type of cancer in America today. It affects 5 million Americans each year. Basal cell cancer and squamous cell cancer are the two most common types of skin cancer. Melanoma is more rare, but itâs also much more dangerous. These cancers typically develop on areas most exposed to direct sunlight, including: head.