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Radiation therapy may be used to treat your cancer. Here is what's involved:

External Beam Radiation Therapy

In external beam radiation therapy, radiation is produced by a machine called a linear accelerator. Short bursts of x-rays are directed from the machine at your cancer. The x-rays come out in a square-shaped manner. The radiation oncologist designs special blocks to shape the radiation beam so that it treats the cancer and as little normal tissue as possible. Before treatment actually begins, your doctor will design specific treatment fields and prepare either computer programs or blocks to shape the treatment beam to fit your particular situation.

Radiation of a Tumor


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Like chemotherapy, the side effects from radiation result from injury to the normal tissues. There are many new ways that your treatment can be customized to try to kill as much cancer while sparing as much normal tissue as possible. The radiation oncologist will determine how many treatments you will receive. Sometimes they will be once a day and sometimes twice a day. Each treatment generally only takes a few minutes. The total treatment time can range from 5-8 weeks depending on the total dose required.

Radiation therapy can be given to treat cancer at its initial site or after it has spread. In some cases, after cancer has spread, radiation is no longer curative. However, the treatments can help resolve problems that the cancer may be causing, including local pain and weakness.

Many people believe that when you have received a certain dose of radiation you can no longer get any more treatment. It is true that each tissue in the body can only safely tolerate a certain dose of radiation. However, the therapy is very focused. It is possible that you can get additional treatments to an already treated area or certainly to an area not yet treated. Ask your radiation oncologist about what dose you can safely receive.

Possible side effects include:

  • Fatigue
  • Skin changes, such as redness and irritation
  • Feelings of anger, anxiety, depression, and frustration
  • Reduced blood cell count, particularly in white cells, but it could also affect red cells or platelets
  • Hair loss
  • Changes in appetite
When to Contact Your Doctor

Call your doctor if you:

  • Develop side effects from the treatment
  • Develop new or unusual symptoms
  • Notice that your skin is red, blistered, or swollen

References:

Hodgkin disease. American Cancer Society website. Available at: http://www.cancer.org/cancer/hodgkindisease/index. Accessed April 30, 2013.

Hodgkin disease. EBSCO DynaMed website. Available at: https://dynamed.ebscohost.com/about/about-us. Updated March 8, 2013. Accessed April 30, 2013.

Hodgkin lymphoma. National Cancer Institute website. Available at: http://www.cancer.gov/cancertopics/types/hodgkin . Accessed April 30, 2013.



Last reviewed April 2013 by Mohei Abouzied, MD; Michael Woods, MD

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.

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