If you are experiencing pain on top of your foot, you should consider seeing your doctor as soon as possible. Pain in this location is not normal, and usually indicates a more serious problem. Catching conditions and injuries such as stress fractures in their early stages is vital to successful treatment.
Natural killer cell: A cell that can react against and destroy another cell without prior sensitization to it. Abbreviated NK cell. NK cells are part of our first line of defense against cancer cells and virus-infected cells. NK cells are small lymphocytes that originate in the bone marrow and develop without the influence of the thymus. An NK cell attaches to a target cell, releases chemicals that breach its cell wall, and causes it to lyse (break up).
B-Lymphocytes (B-Cells). A type of white blood cell that makes antibodies. B lymphocytes are part of the immune system and develop from stem cells in the bone marrow. Also called B cell.acrophages. A type of white blood cell that surrounds and kills microorganisms, removes dead cells, and stimulates the action of other immune system cells. Monocytes. A type of immune cell that is made in the bone marrow and travels through the blood to tissues in the body where it becomes a macrophage.