[A fatal case of anaphylactoid shock after administration of nonionic contrast medium]

We report a case of fatal anaphylactoid shock caused by a CT examination using nonionic contrast medium. A 79-year-old female patient was diagnosed with right recurrent nerve plasy. There was no known history of drug allergy or exposure to contrast medium. Approximately 50 seconds after contrast medium bolus injection began, the patient was noted to be apneic. Despite cardiopulmonary resucitation, the patient died. An autopsy demonstrated marked laryngeal edema and showed extensive mast cell infiltration.