Nonneoplastic Lesion Atlas and Nomenclature Resources | National Institute of Environmental Health Sciences

Nonneoplastic Lesion Atlas and Nomenclature Resources | National Institute of Environmental Health Sciences
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Nonneoplastic Lesion Atlas and Nomenclature Resources
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Global Toxicologic Pathology Training Program
National Toxicology Program Nonneoplastic Lesion Atlas (NNLA)
Guide for standardized terminology in toxicologic pathology for rodents
: Toxicologists, pathologists, and pathology residents worldwide can benefit from free access to this online resource with thousands of images and diagnostic guidelines for rodent lesions.
Related Links
International Harmonization of Nomenclature and Diagnostic Criteria for Lesions
: Publications for each rodent system and select non-rodent species that provide standardized nomenclature for microscopic lesions observed in toxicity and carcinogenicity studies.
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Last Reviewed: January 06, 2026