Head & neck cancer refers to cancers of the mouth, nose, throat, thyroid, parathyroid glands, larynx, sinuses, or salivary glands. (Tumors of the eye and brain are not included in this category and are treated by different specialists). The seventh most common cancers in the world, head and neck cancers account for 4% of all cancers in the US. The American Cancer Society projects that 71,000 Americans are diagnosed with a head and neck cancer each year.