The average 5 year costs of cancer vary depending on the type of cancer. In 2004, it cost $20,000 every 5 years for patients with breast cancer or melanoma--it cost more than $40,000 for patients with brain, gastric, esophageal, ovarian, or lymphoma cancers during the same period.
Yabroff, Robin, Elizabeth Lamont, Angela Mariotto, Joan Warren, Marie Topor, Angela Meekins, and Martin Brown. 2008. 'Cost of Care for Elderly Cancer Patients in the United States'.