Parathyroid hormone (PTH) is released by the parathyroid glands. The four tiny parathyroid glands are located in the neck, near or attached to the back side of the thyroid gland. PTH controls calcium, phosphorus, and vitamin D levels in the blood. It is important for regulating bone growth.
What is skin cancer? Skin cancer is a broad term that refers to any type of cancer that begins in the cells of the skin. These cancers usually develop in the top layer of skin, also known as the epidermis. The most common types of skin cancer are basal cell carcinoma, squamous cell carcinoma and melanoma. In addition, there are several types of skin cancers that occur much less frequently, including kaposi sarcoma, merkel cell carcinoma, cutaneous (skin) lymphoma, skin adnexal tumors and various types of sarcomas.
Skin Cancer Image Gallery. Skin cancer is by far the most common type of cancer. Nearly all skin cancers can be treated effectively if they are found early, so knowing what to look for is important. There are many types of skin cancer, each of which can look different on the skin. This picture gallery contains some examples of the more common types of skin cancer, as well as some other non-cancerous types of skin growths. But skin cancers can look different from these examples.