Skip to content

Urticaria

Videos

Notes

Integumentary system

Pathology

Assessments
Urticaria

Flashcards

0 / 10 complete

Questions

1 / 2 complete
High Yield Notes
5 pages
Flashcards

Urticaria

10 flashcards
Questions

USMLE® Step 1 style questions USMLE

2 questions
Preview

A 7-month-old boy is brought to the office because of a recurrent pruritic rash on his body. His parent first noticed a few lesions 4 days ago that disappeared within 2 hours. On subsequent days, similar but widespread lesions occurred that improved within a few hours without any intervention. His parent states he has not had any fevers, fatigue, or loss of appetite recently. He recently started gradually weaning off breast milk exclusively and eats boiled eggs for breakfast. He was born via spontaneous vaginal delivery, and his parent reports he has been healthy with no medical conditions. Vitals are within normal limits. Physical examination shows well-demarcated, raised, erythematous plaques as shown:


Reproduced from: Wikimedia Commons

Which of the following is the most likely pathophysiology of this patient’s condition?

External References
Summary
Urticaria, commonly referred to as hives, is a kind of skin rash notable for pale red, raised, itchy bumps. Urticaria may cause a burning or stinging sensation. Lesions are frequently caused by allergic reactions; however, there are many nonallergic causes. Most cases of hives lasting less than six weeks (acute urticaria) are the result of an allergic trigger. Chronic urticaria (hives lasting longer than six weeks) is rarely due to an allergy.