Ectopic Normal Kidney Tissue of the Liver | National Institute of Environmental Health Sciences Skip Navigation Ectopic Normal Kidney Tissue of the Liver Close the left navigation Add 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 The Digitized Atlas of Mouse Liver Lesions Back to Top Last Reviewed: February 04, 2026