What is the cause of head and neck cancers?

Head and neck cancers involve the respiratory tract and the digestive tract; and they interfere with the functions of eating and breathing. Laryngeal cancers affect speech.

Nope =)

Refraining from the use of all tobacco products (cigarettes, cigars, pipe tobacco, chewing tobacco), consuming alcohol in moderation, and practicing good oral hygiene.

The cancers can be treated successfully if diagnosed early. The choice of treatment depends on the size of the tumor, its location, and whether it has spread to other parts of the body.

There is no such thing as "head" or "neck" cancer. Cancer is general term for the abnormal multiplying of cells because of a mutation in their DNA ie- a tumor( although, not all tumors are caused by...