The Physician Data Query (PDQ®) cancer database was developed and is maintained by the U.S. National Cancer Institute (NCI).
PDQ is a comprehensive source of cancer information.
PDQ contains summaries on a wide range of cancer topics, information about cancer-related drugs and drug combinations, cancer-related dictionaries and drug terms, genetics term, and provides a directory of genetics services providers.
The Metathesaurus representation consists of the PDQ Terminology, which contains the names, synonyms, definitions and inter-relationships of the terms used to index information in the PDQ system.
PDQ is used by the general public and health professionals seeking cancer-related information.
PDQ is updated regularly.