Tumor forms when cells start to multiply and produce an abnormal growth. Malignant cells can invade nearby tissue and spread to other parts of the body and form cancers. When tumor cells do not have the ability to spread, they are called benign. In many cases, benign tumors can be managed by observation. But depending upon their location, they can have serious impacts.

We spoke with Marc-Elie Nader, M.D., a head and neck surgeon...