Improvements in cancer treatment have decreased the number of deaths from primary cancer. The number of late effects in childhood cancer survivors may increase with age, however, and survivors may not live as long as people who did not have cancer. The most common causes of death in childhood cancer survivors include the following:

• Relapse of the primary cancer.
• Second cancer.
• Heart damage.

Studies of the causes of late effects have led to changes in treatment. This has improved the quality of life for cancer survivors and helped to prevent deaths from late effects.

Glossary Terms

A term for diseases in which abnormal cells divide without control. Cancer cells can invade nearby tissues and can spread to other parts of the body through the blood and lymph systems. There are several main types of cancer. Carcinoma is cancer that begins in the skin or in tissues that line or cover internal organs. Sarcoma is cancer that begins in bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue. Leukemia is cancer that starts in blood-forming tissue such as the bone marrow, and causes large numbers of abnormal blood cells to be produced and enter the blood. Lymphoma and multiple myeloma are cancers that begin in the cells of the immune system. Central nervous system cancers are cancers that begin in the tissues of the brain and spinal cord.

Side effects of cancer treatment that appear months or years after treatment has ended. Late effects include physical and mental problems and second cancers.

The original tumor.

The overall enjoyment of life. Many clinical trials assess the effects of cancer and its treatment on the quality of life. These studies measure aspects of an individual’s sense of well-being and ability to carry out various activities.

The return of signs and symptoms of cancer after a period of improvement.

Refers to a new primary cancer in a person with a history of cancer.