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World Allergy Organization
WAO's mission: To be a global resource and advocate in the field of allergy, advancing excellence in clinical care through education, research and training as a world-wide alliance of allergy and clinical immunology societies.

WAO Allergy Quiz

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Check Your AQ (Allergy Quotient)

Edited by Glenis Scadding, MD

Posted: 6 June 2014

A thirteen year old female patient presents with daily urticaria of 7 months duration. The weals are 3-5 cm in diameter, itchy and each lesion persists for 1-2 hours. She also gives history of photosensitivity. Her urine analysis shows proteinuria 700 mg/day and red blood cell casts.

What is the most probable cause of the urticaria?