Sphere of influence. In the field of international relations, a sphere of influence (SOI) is a spatial region or concept division over which a state or organization has a level of cultural, economic, military, or political exclusivity, accommodating to the interests of powers outside the borders of the state that controls it.
Multiple myeloma is named for the clock face appearance of these cancer cells when seen under a microscope. They infiltrate virtually all of a patient's bone marrow. In x-ray images of multiple myeloma, it looks like holes have been punched out of the bone.
Multiple myeloma is a cancer of the blood. It affects the part of your bone called bone marrow. Your blood is produced in your bone marrow, which is made up of many different types of cells, including red blood cells, white blood cells, platelets, and plasma cells.