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Related Experiment Videos

Exercise-induced urticaria and anaphylaxis.

E Stephansson1, S Koskimies, M L Lokki

  • 1Hospital for Allergic Diseases, University Central Hospital, Helsinki, Finland.

Acta Dermato-Venereologica
|January 1, 1991
PubMed
Summary
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Exercise-induced anaphylactoid reactions are rare but serious. Two distinct patient forms were identified, suggesting different underlying causes for these allergic responses to physical activity.

Area of Science:

  • Allergy and Immunology
  • Exercise Physiology

Background:

  • Exercise-induced anaphylactoid reactions (EIA) are a rare but severe condition.
  • Growing interest in physical exercise necessitates recognition of EIA.

Observation:

  • Five patients with EIA were studied.
  • Two distinct clinical patterns emerged: anaphylactoid and variant forms.
  • Inducing EIA under laboratory conditions proved challenging.

Findings:

  • The anaphylactoid form showed signs of alternative complement pathway activation.
  • The variant form presented initially as cholinergic urticaria, progressing to angioedema and vascular collapse.
  • Variant form patients had elevated plasma histamine but no complement activation.

Implications:

Related Experiment Videos

  • Two distinct pathomechanisms are suggested for EIA.
  • Understanding these differences can aid in diagnosis and management.
  • Further research into EIA triggers and pathways is warranted.