Radiotherapy is frequently the first choice for treating throat cancer when the primary goal is to cure the malignancy while preserving the essential functions of the throat, such as speaking and swallowing. In the UK, it is often recommended as the first line treatment for early stage cancers of the larynx or voice box and the pharynx. Unlike major surgery, which may require the removal of significant portions of tissue, radiotherapy uses high energy rays to target and destroy cancer cells while keeping the underlying structure of the throat intact.
The decision to use radiotherapy as the primary treatment is made by a multidisciplinary team after considering the size, location, and stage of the tumour. For many patients, especially those with small tumours that have not spread, radiotherapy offers a high cure rate comparable to surgery but with the added benefit of maintaining a more natural voice. In more advanced cases, it remains a first choice as part of a combined approach known as chemoradiotherapy, where it is used alongside chemotherapy to increase the chances of successful treatment.
What we will discuss in this article
- Why radiotherapy is preferred for early stage laryngeal cancer
- The role of radiotherapy in preserving the voice and swallowing function
- When radiotherapy is used as a standalone treatment
- The shift toward chemoradiotherapy for moderate to advanced tumours
- How radiotherapy is used for tumours that are difficult to reach surgically
- The use of Intensity Modulated Radiotherapy known as IMRT in the UK
- Factors that might lead a specialist to choose radiotherapy over surgery
Early stage cancer and organ preservation
For early stage throat cancer such as Stage 1 and 2, radiotherapy is often the first choice because of its organ preservation capabilities.
- Laryngeal Cancer: For tumours on the vocal cords, radiotherapy can often cure the cancer while leaving the vocal cords functional. While the voice may become hoarse during treatment, it often returns to a near normal quality afterward.
- Pharyngeal Cancer: Small tumours in the tonsils or the base of the tongue are frequently treated with radiotherapy first, as surgical removal in these areas can be complex and may significantly impact swallowing.
- Comparable Cure Rates: Clinical data in the UK shows that for early stage disease, the long term survival rates for patients treated with radiotherapy are very similar to those who undergo surgery.
Advanced tumours and combined therapy
- Chemoradiotherapy: This is frequently the first choice for moderate to advanced throat cancer. By giving chemotherapy alongside radiotherapy, the drugs make the cancer cells more sensitive to the radiation, making the treatment more powerful than either therapy alone.
- Avoidance of Radical Surgery: For patients with advanced laryngeal cancer, chemoradiotherapy may be used as the primary treatment to avoid a total laryngectomy, which involves the complete removal of the voice box and a permanent stoma.
- Targeting Lymph Nodes: Radiotherapy is also the first choice for treating the lymph nodes in the neck if there is a high risk of microscopic spread, even if the nodes do not appear enlarged on a scan.
Comparison: Radiotherapy vs Surgery as First Choice
| Feature | Radiotherapy as First Choice | Surgery as First Choice |
| Primary Advantage | Preserves speech and swallowing | Immediate removal of the tumour |
| Typical Stage | Early stage or advanced with chemo | Very early or very advanced |
| Treatment Length | Daily for 3 to 7 weeks | Single operation plus recovery |
| Hospital Stay | Outpatient: usually no stay | Inpatient stay required |
| Voice Impact | Hoarseness during treatment | Potential permanent change |
| UK Availability | Specialised oncology centres | Most major surgical hospitals |
To Summarise
Radiotherapy is the first choice for treating throat cancer when specialists aim to achieve a cure without the need for life altering surgery. It is particularly effective for early stage cancers where preserving the voice is a priority and for advanced cases where it can be combined with chemotherapy to provide a comprehensive treatment plan. In the UK, the use of advanced techniques like Intensity Modulated Radiotherapy ensures that the treatment is as precise as possible, minimising damage to healthy tissues. While the choice between radiotherapy and surgery depends on the specific characteristics of the tumour, radiotherapy remains a cornerstone of throat cancer management within the NHS.
If you have been offered radiotherapy as your primary treatment, you can ask your oncologist about the specific type of radiation they plan to use and how it will target your tumour while sparing your healthy tissue.
How many sessions of radiotherapy will I need?
For throat cancer, a typical course involves daily treatments from Monday to Friday for about five to seven weeks. Each session only takes about 10 to 15 minutes.
Will radiotherapy make me radioactive?
No. External beam radiotherapy does not stay in your body. It is perfectly safe for you to be around other people, including children and pregnant women, throughout your treatment.
What is IMRT?
Intensity Modulated Radiotherapy is a modern technique used in UK hospitals that shapes the radiation beams to match the 3D shape of the tumour. This allows higher doses to be given to the cancer while reducing the dose to surrounding organs like the salivary glands.
Can I have radiotherapy if my cancer comes back?
It is difficult to have radiotherapy to the exact same area twice. If the cancer returns in an area that has already been treated with full dose radiation, surgery is usually the next preferred option.
When is surgery chosen over radiotherapy?
Surgery might be the first choice for very small, easily accessible tumours that can be removed with a laser in a single day, or for very advanced tumours where the throat is already too damaged to function properly.
Are there side effects to radiotherapy?
Common side effects during treatment include a very sore throat, difficulty swallowing, dry mouth, and skin redness similar to sunburn. Most of these improve in the weeks following the end of treatment.
Authority Snapshot
This article was reviewed by Dr. Stefan Petrov, a UK trained physician with an MBBS and postgraduate certifications including Basic Life Support BLS, Advanced Cardiac Life Support ACLS, and the UK Medical Licensing Assessment PLAB 1 and 2. Dr. Petrov has extensive clinical experience in general medicine, surgery, and emergency care within the NHS. He has worked in both hospital wards and intensive care units, performing diagnostic procedures and managing the care of patients undergoing complex cancer treatments. This guide follows the standard UK clinical pathways and NICE guidelines for the non surgical management of head and neck cancers.
