Risk factors and causes of head and neck cancer
The cause of head and neck cancer in most people is still unknown, but research is going on all the time to learn more.
A risk factor is something that increases your chance of developing cancer. But having a risk factor for cancer doesn’t mean you’ll definitely get it. Some people with risk factors never develop cancer, and other people without any known risk factors can still develop it.
The main risk factors for head and neck cancer are using tobacco and drinking alcohol. It is thought that about 3 out of 4 head and neck cancers (75%) are linked to tobacco or alcohol use.
Other risk factors include gender, age and infection with a virus called HPV 16. Head and neck cancer is more common in men than women. It’s most common in people over 50, although younger people can be affected too.
Smoking cigarettes, cigars or pipes Back to top
Smoking tobacco increases the risk of developing many types of head and neck cancer, including mouth cancers, throat cancers and cancer of the voice box. The more cigarettes someone smokes, and the more years they smoke for, the higher the risk.
Holding a pipe on your lip, or leaving a cigarette on your lip, when smoking also increases your risk of developing lip cancer.
Chewing tobacco or betel quid (paan) Back to top
Chewing tobacco or betel quid increases the risk of developing mouth cancer.
Drinking alcohol is linked to cancers of the mouth and throat. The more alcohol a person drinks, and the greater number of years they drink for, the higher the risk.
Alcohol and tobacco combined greatly increase the risk of head and neck cancer. People who both smoke and drink heavily over several years have the highest risk of developing head and neck cancers.
Human papilloma virus (HPV) infection Back to top
Cancers at the back of the tongue and in the tonsils (cancers of the oropharynx) have become more common over the past 20 years.
Many of these cancers are linked to infection with a type of virus called human papilloma virus 16 (HPV 16). It’s thought that one of the main ways this virus spreads to the mouth and throat is through oral sex. The risk of infection goes up with increasing numbers of oral sex partners.
A diet that’s high in animal fats and low in fresh fruit and vegetables may increase the risk of developing head and neck cancer. Some types of salted fish that may be eaten as part of a Chinese diet can increase the risk of developing cancer of the nasopharynx.
Exposure to sunlight over a prolonged period of time increases the risk of developing cancer on the outside of the lip. About 1 in 3 people diagnosed with lip cancer work outdoors.
Prolonged exposure to some types of dust and certain chemicals increases the risk of developing cancers of the nasopharynx and sinuses. Hardwood dust, leather dust and formaldehyde (found in MDF dust) are linked to some cancers of the nasopharynx and sinuses.
Pre-cancerous conditions Back to top
Pre-cancerous conditions of the mouth, such as leukoplakia and erythroplakia (white or red patches in the mouth often linked to tobacco use), increase the risk of a cancer developing in the mouth.
There may be a slightly higher risk of developing a head and neck cancer if you have a close relative (a parent, brother, sister or child) who has had a head and neck cancer.