title: Delayed adverse reaction to nonionic contrast agents.
abstract: Delayed reactions to nonionic contrast agents are not well known. We describe a child with a life-threatening reaction.
  
  
  CONCLUSIONS
  (1) Late adverse contrast reactions can follow nonionic contrast administration without any immediate reaction; (2) the manifestations may be unusual with symptoms not typically associated with a contrast reaction; (3) the reactions are most often self-limiting and minor, but can be serious; (4) the protective effect of steroid pretreatment, especially same-day intravenous therapy, is uncertain.
authors.affiliation: Children's Hospital of Pittsburgh, Department of Radiology, PA 15213, USA. newmanb@chplink.chp.edu
authors.forename: B
authors.initials: B
authors.lastname: Newman
mesh_terms: D000293:Adolescent; D003287:Contrast Media / Q000008:administration & dosage / Q000009:adverse effects*; D004342:Drug Hypersensitivity / Q000209:etiology*; D006801:Humans; D008297:Male; D014283:Triiodobenzoic Acids / Q000008:administration & dosage / Q000009:adverse effects*
chemical_list: D003287:Contrast Media; D014283:Triiodobenzoic Acids; C054871:ioversol