Throat cancer is a general term used to describe malignant tumours that develop in the pharynx, larynx, or tonsils. In the UK, it is often categorised under the broader heading of head and neck cancers. These cancers typically begin in the flat, thin squamous cells that line the inside of the throat. While many people use the term throat cancer broadly, clinically it is divided into several specific types based on exactly where the cancer first develops.
The throat is a complex structure serving both the respiratory and digestive systems. Because different parts of the throat perform different functions, the symptoms and treatment of cancer can vary significantly depending on the site. Early identification is vital in the UK healthcare system, where specific pathways exist to investigate persistent changes in voice, swallowing, or unexplained lumps in the neck.
What we will discuss in this article
- The clinical definition of throat cancer and squamous cell carcinomas
- The three main areas of the pharynx: nasopharynx, oropharynx, and hypopharynx
- Laryngeal cancer and its impact on the voice box
- The role of the tonsils in oropharyngeal cancer
- How cancer can affect the epiglottis and surrounding tissues
- UK statistics and common risk factors for different throat areas
- The importance of site specific diagnosis for treatment planning
Areas of the pharynx affected by cancer
The pharynx is a hollow tube that runs from behind your nose to the top of your windpipe. It is divided into three distinct sections, each of which can be affected by cancer.
The three sections are:
- Nasopharynx: This is the upper part of the throat, located behind the nose. Nasopharyngeal cancer is less common in the UK than other types and is often linked to the Epstein Barr virus rather than smoking.
- Oropharynx: This is the middle part of the throat, including the back of the mouth, the base of the tongue, and the tonsils. Oropharyngeal cancer has seen an increase in cases recently, often linked to the Human Papillomavirus HPV.
- Hypopharynx: This is the lower part of the throat, just above the oesophagus and windpipe. Because this area is tucked away, cancers here are often diagnosed at a later stage when they begin to interfere with swallowing.
Laryngeal cancer and the voice box
The larynx is located just below the pharynx and contains your vocal cords. Cancer of the larynx is one of the most common forms of throat cancer in the UK.
It is further divided into three areas:
- Supraglottic: The area above the vocal cords, including the epiglottis, which prevents food from entering your windpipe.
- Glottis: The area containing the vocal cords themselves. Cancers here often cause hoarseness very early on.
- Subglottic: The area below the vocal cords leading to the windpipe. This is the rarest site for laryngeal cancer.
Tonsil and base of tongue cancer
Comparison: Throat Cancer Sites and Common Symptoms
| Area Affected | Specific Site | Common Early Symptom |
| Nasopharynx | Behind the nose | Stuffy nose or hearing loss in one ear |
| Oropharynx | Tonsils and base of tongue | Persistent sore throat or a neck lump |
| Hypopharynx | Lower throat | Difficulty swallowing or ear pain |
| Larynx Glottis | Vocal cords | Persistent hoarseness for over 3 weeks |
| Larynx Supraglottis | Above vocal cords | Feeling of a lump or pain when swallowing |
| Epiglottis | Windpipe flap | Muffled voice or noisy breathing |
To Summarise
Throat cancer is not a single disease but a group of cancers affecting different parts of the pharynx and larynx. Whether it develops in the nasopharynx, oropharynx, hypopharynx, or the larynx itself, the specific location determines the symptoms and the clinical approach taken in the UK. Most throat cancers are squamous cell carcinomas, and while they can be serious, early detection at a specific site significantly improves outcomes. If you experience persistent changes in your throat, voice, or neck, it is essential to have these assessed to identify which area, if any, is being affected.
If you have concerns about persistent symptoms in any of these areas, contact your GP surgery for a physical examination and clinical history review.
Is a sore throat a common sign of throat cancer?
While a sore throat is usually viral, a persistent sore throat that lasts longer than three weeks without an obvious cause can be a symptom of oropharyngeal or hypopharyngeal cancer and should be checked by a GP.
What is the most common area for throat cancer in the UK?
Laryngeal cancer, particularly affecting the vocal cords or glottis, is one of the most frequently diagnosed types. Oropharyngeal cancer, especially tonsil cancer linked to HPV, is also increasingly common.
Does HPV affect all areas of the throat?
HPV is most strongly linked to cancers of the oropharynx, including the tonsils and the base of the tongue. It is less commonly a factor in nasopharyngeal or laryngeal cancers.
Can throat cancer affect the thyroid?
No, thyroid cancer is separate from throat cancer. However, because the thyroid gland is located in the front of the neck near the larynx, a thyroid lump can sometimes be mistaken for a throat issue.
Why does throat cancer sometimes cause ear pain?
This is known as referred pain. The nerves that supply the lower parts of the throat also supply the ear. Cancer in the hypopharynx or larynx can trick the brain into feeling pain in the ear.
How do UK doctors find out exactly where the cancer is?
Clinicians use a Nas endoscopy, which is a flexible camera passed through the nose, to look at all the areas of the pharynx and larynx. This allows them to see exactly where any abnormal tissue is located.
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 experience in hospital wards and emergency care, where he has been involved in the initial identification and referral of patients with suspected head and neck malignancies. This guide follows the standard UK clinical pathways and NICE guidelines for the classification and diagnosis of throat cancers.
