The worst radiotherapy side effects vary but often involve severe, long-lasting issues like debilitating fatigue, dry mouth (head/neck), chronic diarrhea (abdomen/pelvis), nerve damage causing cognitive/swallowing issues, lymphedema (limb swelling), osteoradionecrosis (bone death, jaw), hormone imbalances, and potential tissue fibrosis, significantly impacting quality of life and requiring ongoing management.
General long term side effects
Healthy cells that are damaged during radiation treatment usually recover within a few months after treatment is over. But sometimes people may have side effects that do not improve. Other side effects may show up months or years after radiation therapy is over. These are called late effects.
Side effects include radiation damage to healthy tissue. Within a few days of starting treatment, some patients may develop nausea and fever, skin reddening and hair loss. These symptoms will improve as the treatment progresses. Some patients may develop skin damage later in their treatment.
Nausea and vomiting
A few people feel sick during radiotherapy – it depends on which part of the body is being treated. Some people feel sick at the beginning of a course of treatment but find that nausea often disappears within a day or two. Others start to feel sick later on.
Radiation oncology is localized: it targets only the affected area of the body, and therefore, tends to have fewer side effects. Chemotherapy, on the other hand, generally affects multiple organ systems and tends to produce a gamut of side effects.
Most people start feeling fatigued after a few weeks of radiation therapy. It usually gets worse as treatment goes on. It can last a long time and get in the way of normal activities, but it usually goes away over time after treatment ends.
For example, the following tissues and organs are listed from most radiosensitive to least radiosensitive:
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)
A new study from the University of Chicago Medicine Comprehensive Cancer Center reveals that radiation therapy can spur growth in untreated metastatic tumors—even if they're distant from the site being treated.
Drinking lots of water and staying active can help patients flush radiation out of their systems faster. Not only this, but increasing your fiber intake is also a great way to increase the amount of radiation released from your body.
After treatment is completed, follow-up appointments will be scheduled so that your radiation oncologist can make sure your recovery is proceeding normally and can continue to monitor your health status. Your radiation oncologist may also order additional diagnostic tests.
While radioresponsive tumors start to shrink in a few days, most head and neck cancers may take weeks or longer to shrink. Some low-grade, slowly proliferating tumors histologically appear to be viable for prolonged periods after irradiation.
Palliative radiotherapy aims at symptom alleviation and improvement of quality of life. It may be effective in conferring a reasonable quantum of local control, as well as possibly prolonging survival on the short term.
After radiation therapy ends, you will still need to take special care of yourself. It is normal to need extra rest – this means your healthy tissues are rebuilding. Take naps as needed and try to get more sleep at night. Work back into your pre-treatment schedule of activities by reintroducing them a little at a time.
For example, when treating the brain, you may experience hair loss on your head, but you would not be itchy on your chest due to brain radiation. Side effects generally begin 1-2 weeks into treatment and may peak 1-2 weeks after treatment is completed, then healing will begin.
It is an intricate process often involving several therapy sessions over multiple weeks, and there are various factors which can influence how effective radiotherapy may be in any individual patient: Tumour type. For example, breast cancer and prostate cancer tend to respond positively to radiotherapy.
Lung and bronchus, colorectal, pancreatic, and breast cancers are responsible for nearly 50% of all deaths.
Normally, patients get a chemotherapy infusion once a week, then start their first radiation treatment within 24 hours. Rosenthal: When chemotherapy is used alone as a systemic therapy, we can give patients a high dose of multiple drugs, typically every three weeks.
Radiation therapy and chemo are often combined to treat cancer. While both treatments are effective, chemo generally produces more serious side effects than radiation therapy. How radiation therapy is used to treat cancer. American Cancer Society.
In addition, the epithelium of the digestive tract is constantly metabolized and is also highly sensitive to radiation. On the other hand, nerve tissues and muscle tissues, which no longer undergo cell division at the adult stage, are known to be resistant to radiation.
Late effects of radiotherapy can vary between people and depend on which part of the body you had treated. They can include pain or swelling in the area, skin changes, and loss of movement or function. If you had your pelvis treated you may have concerns about bowel, bladder, gynaecological or erectile symptoms.
How do I know if my treatment has worked? Radiotherapy can keep working for several weeks after treatment has finished. You may not find out for a few months about the results of your treatment; you will have a follow up appointment to discuss this further.
It's important not to rub, scrub or scratch any sensitive spots. Also avoid putting anything that is very hot or very cold—such as heating pads or ice packs—on your treated skin.
Radiation therapy has a 90-95% success rate in stage I, 85-90 % success rate in stage II, and 75-80% success rate in stage III. After radiation therapy, the patient is advised to visit the doctor for follow-up every three months.