It causes red or purple lesions on the skin and spreads to other parts of the body. Ewing's sarcoma is a rare disease in which cancerous cells are found in the bone. It occurs most commonly in the pelvis, the thigh bone, the upper arm bone, or the ribs. Ewing's sarcoma is most often seen in teenagers. Myeloma Myeloma is the uncontrolled growth of plasma cells in the bone marrow.
Plasma cells are a critical part of the body's immune system.
They are manufactured in bone marrow and then move into the bloodstream. Lymphoma Lymphoma is a cancerous tumor originating in the lymph system. The lymph system is a connecting network of glands and vessels which produce and circulate lymph through the body. Lymph is a colorless, watery fluid that contains white blood cells called lymphocytes. Along the vessels are organs called nodes.