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The goal of the NTP Symposium is to present current diagnostic pathology or nomenclature issues to the toxicologic pathology community. This article presents summaries of the speakers\u2019 presentations, including diagnostic or nomenclature issues that were presented, along with select images that were used for audience voting or discussion. Some lesions and topics covered during the symposium include eosinophilic crystalline pneumonia in a transgenic mouse model; differentiating adrenal cortical cystic degeneration from adenoma; atypical eosinophilic foci of altered hepatocytes; differentiating cardiac schwannoma from cardiomyopathy; diagnosis of cardiac papillary muscle lesions; intrahepatocytic erythrocytes and venous subendothelial hepatocytes; lesions in Rathke\u2019s cleft and pars distalis; pernicious anemia and megaloblastic disorders; embryonic neuroepithelial dysplasia, holoprosencephaly and exencephaly; and INHAND nomenclature for select cardiovascular lesions.<\/jats:p>","DOI":"10.1177\/0192623312467102","type":"journal-article","created":{"date-parts":[[2012,12,22]],"date-time":"2012-12-22T03:44:59Z","timestamp":1356147899000},"page":"151-180","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":12,"title":["Proceedings of the 2012 National Toxicology Program Satellite Symposium"],"prefix":"10.1177","volume":"41","author":[{"given":"Susan A.","family":"Elmore","sequence":"first","affiliation":[{"name":"National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Brian R.","family":"Berridge","sequence":"additional","affiliation":[{"name":"GlaxoSmithKline, Raleigh, North Carolina, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael C.","family":"Boyle","sequence":"additional","affiliation":[{"name":"National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michelle C.","family":"Cora","sequence":"additional","affiliation":[{"name":"National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mark J.","family":"Hoenerhoff","sequence":"additional","affiliation":[{"name":"National Toxicology Program, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Linda","family":"Kooistra","sequence":"additional","affiliation":[{"name":"Charles River Laboratories, Pathology Associates, Durham, North Carolina, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Victoria A.","family":"Laast","sequence":"additional","affiliation":[{"name":"Covance Pharmaceutical R&D Co. 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