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 rare type of cancer that develops in plasma cells. Plasma cells are a type of white blood cell in the body. In a healthy body, plasma cells are responsible for recognizing and fighting off invading germs and infections. In people diagnosed with multiple myeloma, cancer cells eventually overtake the healthy plasma cells.