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- IARC group 2B substances, mixtures and exposure circumstances are those that have been classified as "possibly carcinogenic to humans" by the International Agency for Research on Cancer (IARC) as This category is used when there is limited evidence of carcinogenicity in humans and less than sufficient evidence of carcinogenicity in experimental animals.
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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.
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
- Abstract
- Motivation and Process For Preamble Revision
- Key Changes in The Revised Preamble
- Funding
- Notes
For nearly 50 years, the Monographs program of the International Agency for Research on Cancer (IARC) has been a premier global resource for identifying agents that can cause cancer. The identification of carcinogenic hazards is a necessary initial step in cancer prevention. National and international authorities and organizations use information o...
Since 2006, substantial growth has occurred in the scientific understanding of factors contributing to carcinogenicity as well as in the development of methods for information gathering, evidence assessment, and integration. In 2018, the IARC convened an “Advisory Group to Recommend an Update to the Preamble,” with broad expertise across multiple d...
General Procedures
The advisory group encouraged the IARC to clarify the purpose and scope of the Monographs evaluations. In this regard, the name of the Monographs series has been changed to the IARC Monographs on the Identification of Carcinogenic Hazards to Humans. This change, although semantic in nature, reflects the important distinction between hazard and risk: Hazard refers to the strength of the evidence that an agent is a carcinogen, whereas risk refers to the probability that a given exposure to a ca...
Scientific Review and Evaluation
The revised Preamble defines how the principles of systematic review (eg, formal consideration of quality of the studies, such as design and methodology, and the reporting of results that are tailored to each stream of evidence and the types of studies available) apply to IARC assessments and how evaluations are reached to clearly articulate the rationales for expert judgments. At the same time, it is designed to be flexible enough to enable incorporation of further scientific advances as the...
This work was supported by the German Ministry of Health and the International Agency for Research on Cancer.
The findings and conclusions in this article are those of the authors and do not necessarily represent the official position of the International Agency for Research on Cancer, the US Centers for Disease Control and Prevention, the US Food and Drug Administration, the US Environmental Protection Agency, or the US National Institute of Environmental...
- 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.
16 June 2023. IARC Monographs hazard classification. 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.
After evaluating the weight of the evidence that an agent can increase the risk of cancer, the Working Group classifies the agent into one of five categories: 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 to humans; or Gro...
Overview. Volume 100 of the IARC Monographs, A Review of Human Carcinogens, covers all agents previously classified by IARC as "carcinogenic to humans (Group 1)" and was developed by six separate Working Groups: Pharmaceuticals; Biological agents; Arsenic, Metals, Fibres, and Dusts; Radiation; Personal Habits and Indoor Combustions; Chemical ...
