http://www.cancer.org/

Information about cancer and related issues: its prevention, cancer risk, early detection, treatment, after treatment health, support for patients and survivors. It also presents information about the American Cancer Society. There's content developed for patients, survivors, family and friends, for ACS supporters, for media, researchers, and healthcare professionals and for general public. By registering for this site, users can access their own planner with a personal calendar, a to-do list and a bookmarks page and some other information. They can also participate in discussions on a message board, choose some preferences in order to customize the site for them. Books related to cancer can be bought at their online bookstore.There's some basic information about cancer in Spanish.