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Stereotactic Gamma Ray Surgery for Extracranial Lesions and Tumors

Medically reviewed by Last updated on Dec 2, 2022.

This surgery is used to treat lesions and tumors in areas such as your organs, spine, or prostate. They can be benign (not cancer) or malignant (cancerous). Beams of radiation kill the tumor cells. Normal tissues near the tumor get little or no radiation. You may have 1 treatment using high-energy beams, or many treatments using weaker beams.


Call your local emergency number (911 in the US) if:

  • You suddenly feel lightheaded and short of breath.
  • You have chest pain when you take a deep breath or cough.
  • You cough up blood.

Seek care immediately if:

  • Your arm or leg feels warm, tender, and painful. It may look swollen and red.

Call your doctor or surgeon if:

  • You have a fever.
  • You notice a change in how you feel and move parts of your body.
  • You have dizziness or nausea, or you are vomiting.
  • You have questions or concerns about your condition or care.

Follow up with your doctor or surgeon as directed:

Ask if and when you need to return for more gamma ray treatments. Write down your questions so you remember to ask them during your visits.

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The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.