AL-ras x AL-myc Bitransgenic Mouse Liver Lesions | National Institute of Environmental Health Sciences Skip Navigation AL-ras x AL-myc Bitransgenic Mouse Liver Lesions Close the left navigation The Digitized Atlas of Mouse Liver Lesions Much of the work carried out by DTT is in support of the National Toxicology Program (NTP), an interagency partnership of the Food and Drug Administration, National Institute for Occupational Safety and Health, and NIEHS. Visit the NTP Website An hepatocellular carcinoma in a 6-week old AL-ras x AL-myc bitransgenic mouse. Cholangiocarcinoma in a 4-week old AL-ras x AL-myc mouse. Back to Top Last Reviewed: February 04, 2026