Head and Neck surgery generally refers to the treatment of major head and neck cancers.  These cancers can arise from the skin (scalp, nose, lip, ear etc), the salivary glands (parotid gland, submandibular gland), inside the oral cavity (tongue, palate, tonsil etc), or any other structure in the head and neck region.  Often these major cancers have spread to the lymph nodes in the neck.  The surgical treatment of these cancers is often quite extensive and destructive, requiring major reconstruction.