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Eosinophilic allergic polyp: a clinically oriented concept of nasal polyp.
MedLine Citation:
PMID:  21493424     Owner:  NLM     Status:  In-Data-Review    
Objective. Tissue eosinophilia is a hallmark of nasal polyposis. However, there is no universally accepted definition for eosinophilic nasal polyp. The aims of this study were to histologically analyze the inflammatory cell population in the nasal polyp and propose the concept of eosinophilic allergic polyp (EAP), a simple and objective concept that would be clinically and practically valuable. Study Design. A cohort study with histological analysis of tissue sections and chart review. Setting. A tertiary university hospital. Subjects and Methods. Nasal polyp tissues were harvested during routine endoscopic sinus surgery from a cohort of 118 patients. Total number of inflammatory cells, including eosinophils, was counted. The presence of allergy and asthma was assessed, which was then correlated with the histologic findings. To determine a criterion for EAP, a receiver operating characteristic curve was used to identify the best cutoff point, which was further validated by comparing the eosinophil proportion in each group with reference to the clinical parameters. Results. Eosinophil accounted for an average of 18.7% of all inflammatory cells. The proportion of nasal polyps with at least 1 or more eosinophil infiltration accounted for 90.7% of all nasal polyps. When the concept of EAP was applied, a tissue eosinophil count of 11% was found to be significant and clinically most useful. Using this criterion, the proportion of EAP among nasal polyps was 62.7%. Conclusion. The authors suggest a tissue eosinophil proportion of more than 11% as a criterion for EAP, a clinically useful concept of nasal polyp that bears good correlation with asthma and allergy.
Woo-Jin Jeong; Chul Hee Lee; Sang-Heon Cho; Chae-Seo Rhee
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Publication Detail:
Type:  Journal Article     Date:  2010-12-20
Journal Detail:
Title:  Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery     Volume:  144     ISSN:  1097-6817     ISO Abbreviation:  Otolaryngol Head Neck Surg     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-04-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8508176     Medline TA:  Otolaryngol Head Neck Surg     Country:  England    
Other Details:
Languages:  eng     Pagination:  241-6     Citation Subset:  IM    
Department of Otorhinolaryngology, Seoul National University College of Medicine, Seoul, Korea.
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