PDQ® Cancer Information for Health Professionals is the National Cancer Institute (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. It includes cancer information written for both health professionals and patients/families. The database’s primary language is English, but most of it has also been translated into Spanish, and some information has been translated into Chinese and Japanese.