Cancer is an umbrella term for a large group of diseases caused when abnormal cells divide rapidly, and spread to other tissue and organs. Cancer is one of the leading causes of death in the world.
Carcinoma is a cancer that starts in the skin or the tissues that line other organs.
Sarcoma is a cancer of connective tissues such as bones, muscles, cartilage, and blood vessels.
Leukemia is a cancer of bone marrow, which creates blood cells.
Lymphoma and myeloma are cancers of the immune system.