National Cancer Institute at the National Institutes of Health
Cancer.gov: What You Need to Know About Kidney Cancer
This resource provides detailed information about kidney cancer. Includes information on symptoms, diagnosis, treatment, and causes of kidney cancer. Also, has links to definitions of many of the medical terms used throughout the site.
Macmillan Cancer Support
Macmillan Cancer Support: Kidney Cancer (Renal Cancer)
Kidney cancer generally is found in middle-aged to older individuals but it can be found in children as well. This comprehensive site examines the causes, diagnosis, and treatment of kidney cancer.
Other
Cancer Guide: Steve Dunn's Kidney Cancer Page
A kidney cancer survivor outlines how he beat the cancer and provides information about treatment options.