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Related Experiment Videos

Immediate-pressure urticaria--a distinct disorder.

F Lawlor1, A Kobza Black, M Greaves

  • 1Institute of Dermatology, St Thomas's Hospital, London, UK.

Clinical and Experimental Dermatology
|May 1, 1991
PubMed
Summary

A new condition, immediate-pressure urticaria, causes skin welts from pressure without dermographism. This case highlights how different types of urticaria often occur together in patients.

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Area of Science:

  • Dermatology
  • Immunology
  • Allergy

Background:

  • Urticaria encompasses various hypersensitivity reactions affecting the skin.
  • Dermographism, a common urticaria type, involves wealing upon skin stroking.
  • Previous urticarial history can influence current presentations.

Observation:

  • A patient presented with immediate wealing in response to direct pressure.
  • This reaction occurred independently of symptomatic dermographism.
  • The patient had a history of cholinergic urticaria and chronic idiopathic urticaria.

Findings:

  • The described condition is termed 'immediate-pressure urticaria'.
  • This case illustrates the frequent co-occurrence or 'clustering' of distinct urticaria types.
  • Immediate-pressure urticaria represents a specific physical urticaria subtype.

Implications:

  • Recognition of immediate-pressure urticaria is crucial for accurate diagnosis.
  • Understanding urticaria clustering aids in comprehensive patient management.
  • Further research into the pathophysiology of physical urticarias is warranted.

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