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Unified Medical Language System (UMLS)

UMLS Vocabularies

PDQ (Physician Data Query) - Synopsis

Search PDQ in the UMLS Metathesaurus
(requires a free UMLS license)

Web site:

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.

Metathesaurus Scope
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.

Update Frequency
PDQ is updated regularly.

Sites Consulted

  1. PDQ® - NCI's Comprehensive Database [Internet]. Bethesda (MD): National Cancer Institute (US); [updated 2016 Sep 13; cited 2019 Apr 26].  Available from: