Radiation therapy
Radiation is a type of x-ray therapy that damages or kills cancer cells. Read more

Recurrence
The reappearance of a disease that had disappeared with earlier treatment.

Red blood cell
A small cell in the blood that brings oxygen to tissues and carries away carbon dioxide.

Regression
Shrinkage of cancer growth.

Relapse
The return of cancer after a remission or after it had been controlled by treatment. After a relapse, the young person must undergo treatment again to try to bring about another remission. It can take months, even years, to bring a child back into remission.

Remission
A complete or partial disappearance of the disease or when it is under control. If a complete remission continues for a number of years, doctors consider the patient cured.

Rhabdomyosarcoma
Rhabdomyosarcoma is a muscle tumour and is the most common soft tissue sarcoma in children. The occurrence peaks between the ages of two and six and also between 15 and 19. Ten per cent of cases appear before the age of one and 70 per cent appear in the first 10 years of life. It can occur in any muscle tissue in the body. The most common sites are the head and neck, including the eye socket and the genitourinary tract. Primary tumours are also found in muscles of the limbs, buttocks and trunk.

Retinoblastoma
Retinoblastoma is a highly malignant cancer of the retina of the eye. It accounts for two per cent of childhood malignancies. Read more