Aspirin exacerbated respiratory disease (AERD) has been defined as a non-steroidal anti-inflammatory drug (NSAID)-triggered hypersensitivity, non-allergic bronchial asthma and chronic rhinosinusitis (CRS) with nasal polyps. The underlying pathophysiology of AERD is not completely understood so far. An altered arachidonic acid metabolism and dysregulated enzyme activity are regarded to be causal. AERD is characterized by recalcitrant CRS with recurrent nasal polyps after sinus surgery, accompanied by difficult to treat bronchial asthma and adverse reaction after NSAID ingestion such as nasal blockage, itching, laryngospasm and severe asthma attacks. Affected individuals suffer from poor quality of life. Besides functional endoscopic sinus surgery, the application of topical and systemic steroids and symptomatic therapy, aspirin desensitization is the only causative treatment option. The diagnostic approach to AERD, the ideal desensitization protocol and especially the following daily maintenance dose is part of an ongoing debate. This article summarizes the current knowledge about the pathophysiology, focuses on modern diagnostic approaches of AERD and discusses various aspirin desensitization protocols with respect to efficacy as well as to undesirable side effects.
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