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Related Experiment Videos

Cholinergic urticaria. A clinical and histologic study.

J V Hirschmann, F Lawlor, J S English

    Archives of Dermatology
    |April 1, 1987
    PubMed
    Summary

    Cholinergic urticaria, often starting in adolescence or early adulthood, typically improves over time. Atopy (allergic predisposition) is more common in these patients, but systemic symptoms and abnormal responses to intradermal tests are rare.

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    Area of Science:

    • Dermatology
    • Allergy and Immunology

    Background:

    • Cholinergic urticaria is a hives condition triggered by heat, exercise, or emotion.
    • Its natural history, associated conditions like atopy, and clinical presentation require further elucidation.

    Purpose of the Study:

    • To investigate the natural history of cholinergic urticaria.
    • To determine the prevalence of atopy and systemic symptoms in patients.
    • To analyze the histopathology and response to intradermal acetylcholine tests.

    Main Methods:

    • Observational study of 35 patients with cholinergic urticaria.
    • Histologic examination of skin biopsies from seven patients.
    • Intradermal injections of acetylcholine, histamine, and methacholine in 18 patients.

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    Main Results:

    • Symptoms typically begin between ages 10-30, persist for years, and often improve with time; 14% experienced spontaneous remission.
    • Atopy was observed in 34% of patients, a higher prevalence than in the general population.
    • Systemic symptoms were infrequent, and intradermal test responses were similar to controls. Histology showed neutrophils around dermal vessels.

    Conclusions:

    • Cholinergic urticaria is a chronic condition that may improve spontaneously.
    • Atopy is a common comorbidity, suggesting a potential link to allergic mechanisms.
    • The condition is primarily characterized by localized skin reactions, with rare systemic involvement.