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UMLS Vocabularies

NCI_CTCAE (Common Terminology Criteria for Adverse Events) - Synopsis

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The U.S. National Cancer Institute (NCI) produces the Common Terminology Criteria for Adverse Events (CTCAE).

CTCAE aids the reporting of adverse events that occur to patients enrolled in cancer therapy clinical trials.

CTCAE is a standard classification and severity grading scale for adverse events in clinical trials and oncology settings.

CTCAE corresponds with MedDRA at its Adverse Event level.  Information systems can integrate CTCAE to exchange safety data and to enable data management for collecting and analyzing adverse event data.

Update Frequency
CTCAE was last updated in 2009.

Metathesaurus Update Frequency
CTCAE is included annually as part of the NCI Thesaurus in the Metathesaurus.

Sites Consulted

  1. National Cancer Institute [Internet]. Bethesda (MD): National Cancer Institute (US); [cited 2014 Dec 02]. CTCAE; [cited 2014 Dec 02]. Available from: