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. Skin cancer is the growth of abnormal skin cells that are capable of invading and destroying other cells. It is the single most common type of cancer found in humans. The cause of most skin cancers is unknown, but overexposure to UV radiation (in sunlight) is a risky factor.Basel cell cancer is the most common for skin cancer, it covers 75% of skin cancer. It is the least cancerous however.n the form of skin cancer, basel cells in the epidermis are altered so they don't produce keratin. Also, it spreads invading dermis and subcutaneous layers. On sunexposed areas of the face, shiny dome-shaped lesions develop. The next common areas are the ears, backs of hands, and shoulders and arms.