Chapter 7: Nasal polyps

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Abstract:

Nasal polyps are inflammatory outgrowths of paranasal sinus mucosa caused by chronic mucosal inflammation that typically arise from the middle meatus and ethmoid region. The main symptoms of nasal polyps are perennial nasal congestion, nasal obstruction, and anosmia or hyposmia. Unlike patients with chronic rhinosinusitis (CRS) without nasal polyps who present with headache and facial pain, patients with nasal polyps typically do not complain of those symptoms. Nasal polyps appear as semitranslucent, pale gray growths in the nasal cavity in contrast to pink or erythematous adjacent mucosa. Nasal polyps occur more frequently in patients with persistent asthma, aspirin-exacerbated respiratory disease (AERD), CRS, and cystic fibrosis. Children with nasal polyps should be evaluated for cystic fibrosis. Churg-Strauss syndrome and ciliary dyskinesia also may be associated with nasal polyps. Nasal polyps have increased numbers of activated eosinophils, mast cells, and IgE. Staphylococcal superantigens may play a role in the Th2 type of chronic eosinophilic inflammation observed in nasal polyps. Dysfunction of the epithelial barrier in nasal polyps causing reduced levels of antimicrobial proteins has been described. Topical nasal steroids are the treatment of choice. They significantly decrease polyp size, nasal congestion, rhinorrhea, and increase nasal airflow. Short courses of oral steroids may be needed to reduce polyp size followed by maintenance therapy with intranasal steroids. Surgery is reserved for cases when polyps cause severe obstruction, recurrent sinusitis, and for patients who have failed medical therapy. Aspirin desensitization may decrease the requirement for polypectomies and sinus surgery in patients with AERD.
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  • Allergy and Asthma Proceedings is a peer reviewed publication dedicated to distributing timely scientific research regarding advancements in the knowledge and practice of allergy, asthma and immunology. Its primary readership consists of allergists and pulmonologists.

    The goal of the Proceedings is to publish articles with a predominantly clinical focus which directly impact quality of care for patients with allergic disease and asthma.

    Featured topics include asthma, rhinitis, sinusitis, food allergies, allergic skin diseases, diagnostic techniques, allergens, and treatment modalities. Published material includes peer-reviewed original research, clinical trials and review articles.

    Articles marked "F" offer free full text for personal noncommercial use only.

    The journal is indexed in Thomson Reuters Web of Science and Science Citation Index Expanded, plus the National Library of Medicine's PubMed service.
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