Abstract
Objective: Antrochoanal polyps (ACPs) are benign polypoid lesions that arise from the maxillary sinus and extend into the choana. Current knowledge regarding the prevalence and clinical features of ACPs in Japan is very limited. Here, we performed a prospective study to evaluate the prevalence and clinical features of ACPs.
Method: Between April 2007 and March 2008, 728 patients undergoing endoscopic endonasal sinus surgery were prospectively enrolled in this study at the Department of Otorhinolaryngology, Jikei University School of Medicine.
Results: Fifteen (2.1%) of those patients were diagnosed as having ACP(s). The symptom scores for nasal obstruction, rhinorrhea, and postnasal drip were each significantly reduced postoperatively. The distribution of the ACPs’ origin in the maxillary sinus was as follows: floor of the maxillary sinus to the posterior wall (40%), floor of the maxillary sinus (26.7%), and floor of the maxillary sinus to the internal wall (20%). The recurrence rate following endoscopic endonasal sinus surgery was 13.3%.
Conclusion: Endoscopic endonasal sinus surgery for ACPs was most effective when the origin of the polyp in the maxillary sinus was carefully determined and excised as completely as possible, followed by appropriate postoperative treatment.
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