What is better chemotherapy or radiotherapy?
Matthew Wilson
Updated on January 06, 2026
Radiation therapy involves giving high doses of radiation beams directly into a tumor. The radiation beams change the DNA makeup of the tumor, causing it to shrink or die. This type of cancer treatment has fewer side effects than chemotherapy since it only targets one area of the body.
Is radiation more serious than chemo?
When it comes to side effects, radiation therapy is a little different than chemotherapy in that it only causes side effects in the area being treated (with the exception of fatigue), and generally has risk for both early and late side effects.What comes first chemo or radiotherapy?
Generally, radiotherapy is used after completion of adjuvant chemotherapy [2] but decisive data for a scientifically based decision on the optimal sequence are not known.Why would you use chemo instead of radiation?
The decision about which one is used depends on the type, location, and spread of the cancer. Chemotherapy is a systemic treatment, while radiation therapy is often a localized treatment but may be systemic. Both can have side effects, which can differ by the patient and how the treatment is given.At what stage of cancer is radiotherapy used?
Radiotherapy may be used in the early stages of cancer or after it has started to spread. It can be used to: try to cure the cancer completely (curative radiotherapy) make other treatments more effective – for example, it can be combined with chemotherapy or used before surgery (neo-adjuvant radiotherapy)How Does Chemotherapy Differ From Radiotherapy? #KnowTheDifference
Can cancer spread during radiotherapy?
There are preclinical and clinical reports showing that focal radiotherapy can both increase the development of distant metastasis, as well as that it can induce the regression of established metastases through the abscopal effect.What are the disadvantages of radiotherapy?
What are the disadvantages? Radiotherapy can cause side effects, including tiredness, sickness and runny poo (diarrhoea). If you have chemoradiotherapy, you may get side effects from the chemotherapy.Why do oncologists push chemo?
An oncologist may recommend chemotherapy before and/or after another treatment. For example, in a patient with breast cancer, chemotherapy may be used before surgery, to try to shrink the tumor. The same patient may benefit from chemotherapy after surgery to try to destroy remaining cancer cells.Do tumors grow back after radiation?
Normal cells close to the cancer can also become damaged by radiation, but most recover and go back to working normally. If radiotherapy doesn't kill all of the cancer cells, they will regrow at some point in the future.Does chemo shorten your life?
During the 3 decades, the proportion of survivors treated with chemotherapy alone increased from 18% in 1970-1979 to 54% in 1990-1999, and the life expectancy gap in this chemotherapy-alone group decreased from 11.0 years (95% UI, 9.0-13.1 years) to 6.0 years (95% UI, 4.5-7.6 years).What is the success rate of radiation therapy?
“When patients are treated with modern external-beam radiation therapy, the overall cure rate was 93.3% with a metastasis-free survival rate at 5 years of 96.9%.How many sessions of radiotherapy is normal?
Most people have 5 treatments each week (1 treatment a day from Monday to Friday, with a break at the weekend). But sometimes treatment may be given more than once a day or over the weekend.How long is a course of radiotherapy?
Courses of treatmentThe course of treatment usually lasts between 1 and 7 weeks. The individual radiotherapy doses are often called "fractions".