If you're looking for information on a particular cancer and starting at square one, your best first stop for the most reliable and up to date information are these well-known organizations. They are also excellent gateways for finding more information about causes, treatments, support groups, and other resources.
American Cancer Society www.cancer.org
Cancerwise, a monthly downloadable publication from the MD Anderson Cancer Center at the University of Texas includes articles on the most recent treatments and information on cancer: http://www2.mdanderson.org/cancerwise/
Clinical Trials. Your doctors will not always be up to date on clinical trials for testing new treatments for your particular cancer. The National Cancer Institute has a database at www.cancer.gov/clinicaltrials/search
The HelpBook is downloadable from the Cancer Research Institute at www.cancerresearch.org/resources/HelpBook.html and features not only reliable general information about cancer but an excellent guide for what to do after you're diagnosed, and what to ask and how to talk with your doctor.
HealthLink https://familyhealthlink.osumc.edu/Notice.aspx The Ohio State University Medical Center offers a free online interactive tool for the entire family to measure each person's risk of specific cancers or coronary disease. The assessment takes about 10 minutes and will help you focus your screening and prevention efforts.
Journal of the National Cancer Institute jnci.oxfordjournals.org/ is written for professionals but many of the articles are understandable by lay people, and it features some of the most up to date information on treatments, treatment guidelines, supportive care and other issues. It has a searchable database. Many of the articles cost approximately $32 but a substantial number are also free.
National Cancer Institute www.cancer.gov