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How does the IARC select a carcinogenic agent?
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Dec 1, 2023 · Carcinogenic to humans: 128 agents: Group 2A: Probably carcinogenic to humans 95 agents: Group 2B: Possibly carcinogenic to humans: 323 agents: Group 3: Not classifiable as to its carcinogenicity to humans: 500 agents
Feb 24, 2015 · The terms probably carcinogenic and possibly carcinogenic have no quantitative significance and are used simply as descriptors of different levels of evidence of human carcinogenicity, with probably carcinogenic signifying a higher level of evidence than possibly carcinogenic.
- Neil Pearce, Aaron Blair, Paolo Vineis, Wolfgang Ahrens, Aage Andersen, Josep M. Anto, Bruce K. Arms...
- 2015
Sep 9, 2019 · Slightly more than half of all agents evaluated have been classified as possibly carcinogenic, probably carcinogenic, or carcinogenic to humans ( https://Monographs.iarc.fr/agents-classified-by-the-iarc/ ). The IARC Monographs embody principles of scientific rigor, impartial evaluation, transparency, and consistency.
- Jonathan M Samet, Weihsueh A Chiu, Vincent Cogliano, Jennifer Jinot, David Kriebel, Ruth M Lunn, Fre...
- 2020
Group 1: Carcinogenic to humans; Group 2A: Probably carcinogenic to humans; Group 2B: Possibly carcinogenic to humans; Group 3: Not classifiable as to its carcinogenicity in humans; Perhaps not surprisingly, based on how hard it can be to test possible carcinogens, most are listed as being of probable, possible, or unknown risk.
Since 1971, more than 1000 agents have been evaluated, of which more than 500 have been identified as carcinogenic, probably carcinogenic, or possibly carcinogenic to humans. Read the IARC Monographs Q&A for answers to commonly asked questions on the evaluation process.
This infographic presents the categories used by the IARC Monographs on the Identification of Carcinogenic Hazards to Humans to classify a substance according to the level of certainty that the substance can cause cancer. This classification does not indicate the level of risk associated with exposure. View the infographic in other languages.
In 1991, IARC convened a Working Group on the Use of Data on Mechanisms of Carcinogenesis in Risk Identification, to explore how mechanistic data could be used to identify agents with the potential to cause cancer in humans.
