sentences:  The acute toxicity, carcinogenicity, and metabolism of sterigmatocystin has been compared with those for aflatoxin and several other hepatotoxic mycotoxins.The IARC-classification of sterigmatocystin is group 2B, which means it is carcinogenic in other species and is possibly carcinogenic to humans, but that a definitive link between human exposure and cancer has not been proven.The occurrence of sterigmatocystin in raw materials and foods has not been reported often.