title: The 2004 World Health Organization classification of pituitary tumors: what is new?
abstract: The classification of pituitary tumors is a dynamic area that changes with advances in cell biology that provide a deeper insight and clearer understanding of cell lineages and pathogenetic mechanisms. The 2004 edition of the World Heath Organization (WHO) text "Histological typing of endocrine tumors" reflects the progress that has been achieved since the previous edition of 2000. Here we review the new information and identify areas of concern for the next effort at classification of pituitary tumors.
authors.affiliation: Department of Pathology, University Health Network and Toronto Medical Laboratories, University of Toronto, Toronto, Ontario, M5G 2M9, Canada.
authors.forename: Mubarak
authors.initials: M
authors.lastname: Al-Shraim
authors.forename: Sylvia L
authors.initials: SL
authors.lastname: Asa
mesh_terms: D002454:Cell Differentiation; D019070:Cell Lineage; D006801:Humans; D007150:Immunohistochemistry; D010911:Pituitary Neoplasms / Q000145:classification* / Q000473:pathology / Q000503:physiopathology; D011237:Predictive Value of Tests; D011379:Prognosis; D009626:Terminology as Topic; D014944:World Health Organization