A lower than the normal number of red blood cells, which carry oxygen from the lungs and distribute it throughout the entire body.

Occurring when the marrow ceases to produce enough white blood cells to fight infection, platelets to stop bleeding, and red blood cells to provide oxygen to the body.

Abnormal growths of cells in the brain or central nervous system, classified by where they start from and whether they are benign or malignant.

An abnormal growth of cells, rapidly reproducing despite restriction of space, nutrients shared by other cells or signals sent from the body to stop reproduction.

A cancer that occurs primarily in the bone or soft tissue, most often found in the extremities and can involve muscle and the soft tissues around the tumor site.

Malignant (cancerous) or benign (non-cancerous) tumors that are composed mostly of germ cells — cells in the unborn baby that become the reproductive system.

A general term describing a condition in which red blood cells are broken down faster than the bone marrow is able to produce them.

An inherited bleeding disorder characterized by low levels or complete absence of specific proteins in the blood that are necessary for prevention of excessive bleeding.

A very rare cancerous tumor that originates in the liver. Its cells can spread to other areas of the body, commonly the lungs, abdomen and rarely to the bones and central nervous system.

A type of cancer in the lymphatic system, part of the immune system that functions to fight disease and infections. Hodgkin lymphoma cells can spread to other organs and tissue.

In mild cases, scattered small purple spots on the skin, progressing to increased bruising and nosebleeds and, rarely, bleeding in the GI tract, urinary tract and in the brain.

Cancer of the blood, beginning in the bone marrow, the soft, spongy center of the long bones that produces the three major blood cells: white, red, and platelets.