This week it's the site of the U.S. National Cancer Institute, with an easy-to-remember name, cancer.gov.

It's an authoritative place to learn about the many forms of cancer, and while the information is presented for patients and the general public, there is also detailed technical information for physicians and other specialists.

Now, there are a lot of online sources of medical information, but cancer.gov comes directly from one of the world's premier research institutions, and the information is constantly updated.

MANROW: "We employ rigorous quality assurance in terms of making sure the content is as current and as accurate as it possibly can be. A lot of websites, they'll put information up, but if you look at it over time you'll see that it's not being updated frequently. We have the capability of updating information on our website on a daily basis."

Richard Manrow helps oversee the cancer.gov website, which is a virtual encyclopedia of information on all forms of malignancy — brain tumors, prostate cancer, leukemia, and others. There's also help if you want to reduce your risk of cancer.

MANROW: "In many cases there are factors that contribute to the development of cancer that are beyond our control, but there are things that can be done to prevent certain types of cancer. Certainly the biggest preventable cause of cancer relates to smoking. So we have a lot of information and resources about tobacco cessation."

Among the site's many other features are a dictionary of cancer terms and a database of clinical trials, where promising cancer treatments are tried out on volunteer patients.

MANROW: "We go to great efforts and work with organizations around the world to identify the latest cancer clinical trials that are being conducted, and to provide easy to understand descriptions of those trials for both health professionals and for patients on the website."

The site also includes statistics about cancer, and maybe more important, a guide to understanding those statistics. And much of the information is available in Spanish as well as English.

Authoritative cancer information at our Website of the Week, cancer.gov, or get the link from our site, voanews.com.