Myeloma
Myeloma is a cancer type that affects the plasma cells, a form of white blood cell in the bone marrow. The bone marrow is the soft tissue that manufactures blood cells in most bones. Plasma cells in the bone marrow produce antibodies, proteins that aid the body's defenses against diseases and infections.
Myeloma develops when an abnormal plasma cell forms within the bone marrow and replicates rapidly. Eventually, the quick reproduction of cancerous myeloma cells exceeds the healthy bone marrow cells production. Hence, the malignant cells build up within the bone marrow, overcrowding healthy red and white blood cells.