Successful treatment of four types of chronic urticaria with anti-IgE omalizumab in the same patient

Urticaria is a skin disorder that is characterized by the appearance of wheals (hives), angioedema or both1. Chronic urticaria (CU) is defined as wheals (with or without angioedema) that persists for ≥6 weeks, and is further classified into two subtypes: chronic spontaneous urticaria (CSU) and chronic inducible urticaria (CIndU)1. In most cases of CU a trigger cannot be identified. These cases are defined as CSU. The term inducible urticaria is used when a specific trigger can be linked to the development of CU.

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