What is the Best Evaluation for Chronic Angioedema and Urticaria?
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A good history is the most helpful step in establishing the etiology of chronic urticaria (recurrent bouts over 6 weeks' duration); extensive laboratory studies add little information. (SOR B, based on a prospective study.) Without a specific secondary diagnosis suggested by the history, a complete blood count, sedimentation rate, and thyroid function tests are likely sufficient. (SOR C, based on expert opinion.)
Evidence Based Practice 11(9): 06-07.