(1) This statement, which appears in the August 2000 issue of Pediatrics, updates a previous AAP statement and reflects the current thinking about alcohol exposure in utero and the revised nosology .(2) During the 17th century, Thomas Sydenham founded the discipline of nosology by insisting that diseases had their own natural history and could be described and classified on the basis of their specific characteristics.(3) The members of the international academic community who serve on expert panels that define and develop diagnostic criteria and stage pulmonary diseases need to agree on a set of rules that will govern nosology .(4) Inflammatory myofibroblastic tumor, also referred to as inflammatory fibrosarcoma, is a rare tumor composed of myofibroblastic spindle cells of uncertain etiology and disputed nosology .(5) Psychopathology and psychiatric nosology became the legitimate framework for these interventions.(6) I would like to make a small but practical nosological contribution.(7) Each year, nosologists at TDH reviewed death certificates for certain International Classification of Diseases Codes and forwarded those that met the required codes to TCADA.(8) It has a nosological status and is clearly associated with suffering, ill health, and disability.(9) A new nosological scheme has derived from the need to rapidly assess patients at presentation so that powerful new treatments can be appropriately selected.(10) Death certificates were coded by trained nosologists at the Office of National Statistics according to the International Classification of Disease, 9th revision.(11) Coding was consistent with National Center for Health Statistics standards, and unlike other data sets covering similar periods, all records, at least for 1935-1985, were coded by the same nosologists .(12) There is much evidence, including our own, indicating that patients with BDI and BDII represent two different nosological conditions.(13) These limitations notwithstanding, the present report raises key nosological and methodological questions regarding the diagnosis of children having problems with attention and behavioral inhibition.(14) A trained nosologist upgraded Ninth International Classification of Diseases codes, as previously described.(15) The underlying cause of death was determined from the death certificates by a nosologist at the Australian Bureau of Statistics using the international classification of diseases.