In cooperation of numerous ESTP members and the RITA Group ("Registry of Industrial Toxicology Animal-data") much progress has been obtained in the process of an international harmonization and standardization of nomenclature and diagnostic criteria of proliferative lesions as well as of other issues of toxicologic pathology. Please use the links below to obtain more information.

• Nomenclature and diagnostic criteria
  Initiated by the RITA Group, the nomenclature and diagnostic criteria of proliferative lesions in rats and mice was standardized and has been published by WHO/IARC. More details on these books and on the electronic version WebRENI as well as on the harmonization process with the colleagues of the STP is given here.
  
  
• Revision of Standardized Nomenclature: September 2005
  The chair of the ESTP has contacted the President and Past-President as well as the chairman of the SRPC (Scientific and Regulatory Policy Committee) of the STP in response to a draft proposal for the revision of standardized nomenclature for lesions in the rat and mouse and has offered a close co-operation in this important process. Please read more ...
  
  
• Standardization of organ sampling and trimming
  The "Revised guides for organ sampling and trimming in rats and mice" were recently published by the RITA and NACAD groups in Experimental and Toxicologic Pathology in a series of 3 articles.