Definition:
When there is sufficient evidence of carcinogenicity in humans, the Group A or 1 category is used. Exceptionally, an agent (mixture) may be placed in this category when evidence of carcinogenicity in humans is less than sufficient but there is sufficient evidence of carcinogenicity in experimental animals and strong evidence in exposed humans that the agent (mixture) acts through a relevant mechanism of carcinogenicity.
Source: IARC
Updated: 12-5-2005
When there is sufficient evidence of carcinogenicity in humans, the Group A or 1 category is used. Exceptionally, an agent (mixture) may be placed in this category when evidence of carcinogenicity in humans is less than sufficient but there is sufficient evidence of carcinogenicity in experimental animals and strong evidence in exposed humans that the agent (mixture) acts through a relevant mechanism of carcinogenicity.
Source: IARC
Updated: 12-5-2005
