Radiopaedia Courses 25% Discount in response to COVID-19 ends on October 31 EXPLORE OUR COURSES

Radiation therapy

Radiation therapy, or radiotherapy, is a common oncologic treatment modality utilizing ionizing radiation to control or eliminate malignant cells. Radiotherapy plays a role in primary curative treatment (eg. head and neck cancer), adjuvant therapy (e.g. reducing recurrence rate after local breast cancer surgery) and palliation of cancer symptoms (e.g. reducing pain from bone metastases). Radiotherapy may be used alone, or synergistically with chemotherapy or immunotherapy, e.g. "chemoradiotherapy" etc.

Radiotherapy is also used to treat non-malignant disease, e.g. Graves thyroiditis, keloid scarring etc.


Radiotherapy is customarily divided into three main categories:

Radiation therapy

Article information

rID: 67440
Tag: refs
Synonyms or Alternate Spellings:
  • RT
  • RTx
  • Radiotherapy

ADVERTISEMENT: Supporters see fewers/no ads

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.