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Head and Neck Cancer »

What is cancer?

Cancer is a group of many related diseases that begin in cells, the body's basic unit of life. Normally, cells grow and divide to form new cells in an orderly way. They perform their functions for a while, and then they die. Sometimes, however, cells do not die. Instead, they continue to divide and create new cells that the body does not need. The extra cells form a mass of tissue, called a growth or tumor. There are two types of tumors: benign and malignant. Benign tumors are not cancer. They do not invade nearby tissue or spread to other parts of the body. Malignant tumors are cancer. Their growth invades normal structures near the tumor and spreads to other parts of the body. Metastasis is the spread of cancer beyond one location in the body.

What kinds of cancers are considered cancers of the head and neck?

Most head and neck cancers begin in the cells that line the mucosal surfaces in the head and...

Read the Head and Neck Cancer article »