throat cancer
Meaning of throat cancer: Not one disease: the three levels of the throat differ enough in cause and behavior that the shared name conceals more than it explains.
Definition of throat cancer
Throat cancer is a loose term for cancer arising in the pharynx, the muscular passage running from behind the nose down to where the food pipe and windpipe begin. It covers three levels: the nasopharynx behind the nose, the oropharynx behind the mouth, and the hypopharynx at the bottom. Almost all are squamous cell carcinomas, from the flat cells lining the surface.
Do the three levels behave the same way?
| Level | Main associations | How it tends to behave |
|---|---|---|
| Nasopharynx | Epstein-Barr virus, salt preserved foods, ancestry and geography | Often spreads to neck nodes early; treated mainly without surgery given its position |
| Oropharynx | Human papillomavirus, or tobacco and alcohol | Virus linked tumors respond better and occur in younger, non smoking people |
| Hypopharynx | Tobacco and heavy alcohol | Symptoms appear late, so it is often advanced when found |
Grouping them under one name is a convenience of anatomy, not of biology. The nasopharyngeal form in particular sits apart: its dominant association is a herpes family virus rather than smoking, its distribution around the world is strikingly uneven, and its usual treatment is radiation with chemotherapy because the site is difficult to reach surgically.
What raises the risk?
Tobacco in every form remains the largest single contributor across the group, and heavy alcohol use is the second. The two together do more than add up, since alcohol appears to help tobacco carcinogens penetrate the lining. Human papillomavirus has become a leading cause of oropharyngeal cancer specifically, concentrated in the tonsil and the base of the tongue, and the tumors it produces carry a notably better outlook than tobacco related ones at the same stage. Other contributors include poor oral health, chewed betel preparations, occupational dusts and fumes, and a suppressed immune system.
Where does the larynx fit?
Just below the pharynx, and outside it strictly speaking. The larynx is the voice box, and cancer there is a separate diagnosis, though it is often discussed alongside throat cancer because the risk factors overlap almost completely and the two regions sit against each other. Both belong to the wider group called head and neck cancer, together with cancers of the mouth, salivary glands, nose and sinuses. Symptoms depend heavily on location: a lump in the neck, a persistently sore throat, difficulty or pain on swallowing as the tumor encroaches toward the esophagus, a changed voice, ear pain on one side, or blocked hearing on one side with a nasopharyngeal tumor.
Also known as
Used in a sentence
Biopsy confirmed squamous cell carcinoma consistent with a diagnosis of throat cancer involving the oropharynx.
Good to know
The three levels of the throat differ in their main associations, with human papillomavirus prominent in the oropharynx and Epstein-Barr virus in the nasopharynx, so the site of origin carries more information than the umbrella term.
Word origin
Where “throat cancer” comes from
Cancer takes its name from the Latin word for crab, thought to describe the crablike pattern of swollen veins radiating from certain tumors.