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.
Myeloma is a type of cancer that develops from cells in the bone marrow called plasma cells. Bone marrow is the spongy tissue found inside the inner part of some of our large bones. The bone marrow produces different types of blood cells. Myeloma can develop wherever there are plasma cells.