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An official website of the United States government

About This Website is the central website for the National Cancer Institute (NCI), the U.S. government’s principal agency for cancer research. NCI is mandated by U.S. law to disseminate information about cancer and cancer research. This website serves as an important means to achieving that mission.

Information about Cancer

This website offers free, credible, and comprehensive information about cancer prevention and screening, diagnosis and treatment, research across the cancer spectrum, clinical trials, and news and links to other NCI websites.

The information on this site is science-based, authoritative, and up-to-date. Medical experts, cancer researchers, and editors review the content before it is published to the website.

The Physician Data Query (PDQ®), NCI’s comprehensive cancer information database, forms the core of the information for patients and health professionals. It is regularly updated with the latest evidence-based information. The PDQ cancer information summaries are developed and maintained by the PDQ Editorial Boards.

NCI also provides cancer information in Spanish.

Information about NCI-Supported Research

This website also provides information about NCI-supported research and NCI’s grants and training programs. We report on ongoing progress in cancer research through news releases, research articles, and NCI’s Cancer Currents blog.

This information is reviewed by subject matter experts and updated regularly.

Usability of the Website

NCI regularly seeks input from site visitors through online surveys and by conducting audience research and usability testing. The findings from this research help us present content in ways that meet the needs of our audiences.

Comments about the NCI Website

This website is designed to effectively deliver information about cancer, cancer research, and training whenever and wherever you want it – on your computer, tablet, or smartphone.

We welcome your feedback about the NCI website. If you have a question or comment about this site, please write to us at


This website's policies on various topics can be found on our Policies page, including information on privacy, accessibility, content reuse, linking, and FOIA.

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