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Postmortem findings after fatal anaphylactic reactions.

R S Pumphrey1, I S Roberts

  • 1Immunology Unit, Central Manchester Healthcare NHS Trust Hospitals, UK. Richard.Pumphrey@man.ac.uk

Journal of Clinical Pathology
|May 24, 2000
PubMed
Summary

Fatal anaphylaxis often lacks specific necropsy findings, as death results from shock. A typical clinical history is crucial for diagnosis when postmortem evidence is absent.

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Area of Science:

  • Medical Examiner
  • Forensic Pathology
  • Allergy Immunology

Background:

  • Fatal anaphylaxis is a severe allergic reaction with significant mortality.
  • Accurate determination of anaphylaxis as the cause of death is critical for public health and legal reasons.

Observation:

  • A UK register of fatal anaphylactic reactions identified 130 cases since 1992, with postmortem reports available for 56.
  • Common triggers included insect venom, foods, and medications.
  • Death often occurred rapidly, within one hour of symptom onset.

Findings:

  • Macroscopic necropsy findings indicative of anaphylaxis were infrequent.
  • Signs of asthma, petechial hemorrhages, and laryngeal edema were noted in some cases.
  • Elevated mast cell tryptase and specific IgE antibodies supported the diagnosis in tested cases.
  • A significant proportion of cases (23/56) showed no specific macroscopic findings.

Implications:

  • The absence of specific postmortem findings does not exclude fatal anaphylaxis.
  • Diagnosis relies heavily on clinical history due to the rapid, shock-mediated nature of death.
  • Standardized investigations for fatal anaphylaxis are rarely performed but are crucial for accurate death certification.

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