Smoking has declined as a cause of head and neck cancers, while those caused by the human papillomavirus have increased, say Upstate‘s Robert Kellman, MD, and Seung Shin Hahn, MD. The two physicians describe the symptoms, diagnoses and treatments for cancers of the mouth, throat, lips and larynx in this segment. Kellman is a professor and chair of otolaryngology and communication sciences, and Hahn is a professor of radiation oncology.