Oral problems are common in cancer patients. They can be a part of the disease itself; they can develop as a result of treatment; they can accompany other symptoms and present as a comorbidity; and they can even first present after the original disease itself has been cured. Oral symptoms can be complex to treat, both preventing administration of potentially life-saving treatment, and also directly causing additional life-threatening complications. However, many symptoms can be treated, and lead to tremendous relief of suffering for the patient. Oral complications of cancer and its management...