PDQ® - NCI's Comprehensive Database

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PDQ (Physician Data Query) is NCI's comprehensive source of cancer information. It contains cancer information summaries on a wide range of cancer topics; drug information summaries on many cancer-related drugs and drug combinations; and dictionaries of general cancer terms, drug terms, and genetics terms.  PDQ also contains a searchable listing of  cancer clinical trials from around the world and a directory of professionals who provide genetics services.

PDQ Cancer Information Summaries, Editorial Boards, and Levels of Evidence

PDQ Cancer Information Summaries
The PDQ cancer information summaries are comprehensive, evidence-based summaries on topics that cover adult and pediatric cancer treatment, supportive and palliative care, screening, prevention, genetics, and complementary and alternative medicine.

PDQ Editorial Boards
Comprised of experts in cancer-related specialties, the six PDQ Editorial Boards produce and maintain the evidence-based cancer information summaries.

Levels of Evidence
PDQ cancer information summaries include level-of evidence designations to help readers understand the strength of the evidence supporting the use of specific interventions or approaches.

NCI Drug Information Summaries

NCI Drug Information Summaries
A collection of consumer-friendly summaries from NCI that provide information about many FDA-approved cancer drugs and drug combinations. Summaries for individual cancer drugs cover the uses of these drugs, research results, possible side effects, approval information, and ongoing clinical trials. Summaries for cancer drug combinations list the drugs that make up the combination and explain what the combination is used for.

NCI Dictionaries

Dictionary of Cancer Terms
A dictionary of cancer-related terms and definitions written for a non-technical audience. New terms are reviewed by a multidisciplinary panel of reviewers, and approximately 30 terms are added each month.

NCI Drug Dictionary
A dictionary that contains technical definitions, alternate names, and links to related information for FDA-approved and investigational agents that are being used or tested in the treatment of cancer or cancer-related conditions.

NCI Dictionary of Genetics Terms
A dictionary of genetics-related terms written for healthcare professionals. This resource supports the PDQ cancer genetics information summaries and definitions are written and reviewed by members of the Cancer Genetics Editorial Board.

Clinical Trials

A comprehensive, searchable listing of cancer clinical trials.  This includes abstracts of clinical trial protocols that are open to patient accrual as well as abstracts of clinical trial protocols that are closed to patient accrual, dating back to the 1970s.

The list includes most clinical trials sponsored by NCI. It also contains many clinical trials sponsored by pharmaceutical companies, medical centers, and other groups from around the world.

Search for Clinical Trials
Search NCI's list of cancer clinical trials by selecting a type of cancer, stage/subtype, type of trial, type of treatment/intervention, drug name, phase of trial, or a combination of these and other criteria.

Help Using the NCI Clinical Trials Search Form
Information about searching the NCI list of cancer clinical trials, including an explanation of the information included for each trial and search tips about how to construct a search, display results, and print trials of interest.

Cancer Genetics Services

NCI Cancer Genetics Services Directory
A searchable directory of individuals who provide services related to cancer genetics (cancer risk assessment, genetic counseling, genetic susceptibility testing, and others).

Other Ways to Get PDQ Information

Cancer.gov Content Dissemination Program
Information about Cancer.gov's content dissemination program, which makes cancer information available in XML format for use in Web sites and in other information products.

PDQ in Other Languages

Cancer Information Japan
The Translational Research Informatics Center (TRI) in Kobe, Japan, translates the PDQ cancer information summaries for patients and health professionals, the NCI Dictionary of Cancer Terms, the list of cancer clinical trials, and the drug information summaries into Japanese and makes them available through the TRI website. Translations have not been reviewed by the National Cancer Institute and the listing here does not imply an endorsement.

Arabic (collaboration with Cancer Information Japan)
Selected PDQ content has also been translated into Arabic and made available through the Translational Research Informatics Center (TRI) website.  Translations have not been reviewed by the National Cancer Institute and the listing here does not imply an endorsement.

  • Updated: April 16, 2015