Prognostic factors for recurrence after endoscopic sinus surgery for chronic rhinosinusitis with nasal polyps

Nakayama, T.; Asaka, D.; Kanaya, H.; Kuboki, A.; Haruna, S.-I.

Auris Nasus Larynx 43(6): 641-647


ISSN/ISBN: 1879-1476
PMID: 26987817
DOI: 10.1016/j.anl.2016.02.015
Accession: 058636060

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In this study, we aimed to clarify the prognostic factors affecting the ethmoid condition during a long-term follow-up after endoscopic sinus surgery in patients with chronic rhinosinusitis with nasal polyps (CRSwNP). Thirty-six patients with CRSwNP underwent surgery from December 2008 to February 2012. All surgeries were performed by one surgeon, and all patients were followed up for at least 2 years postoperatively. We investigated the association of postoperative endoscopic findings with clinical parameters, mucosal eosinophil count and mRNA expression of CCL11, IL-5, and IFN-gamma in nasal polyps. Seventeen patients (47.2%) had severe mucosal edema, and the patency of each sinus was not confirmed during the >2-year follow-up. The mucosal eosinophil count and two eosinophil-associated factors, namely the CCL11 and IL-5 mRNA levels, were higher in the severe mucosal edema group than in the control group. The severe mucosal edema group was divided into two subgroups: the steroid-responsive and -resistant groups. Five patients (13.9%) had frank polyp formation because the oral steroids were less effective. The mucosal eosinophil count was significantly different among the four groups, including the control group (p=0.001); however, the CCL11, IL-5, and IFN-gamma mRNA levels were not significantly different. Although the IL-5 mRNA level was not significantly different among the four groups, it tended to increase when the sinus condition worsened. In the severe mucosal edema group, a higher IL-5 mRNA level was associated with earlier severe mucosal edema in the ethmoid cavity. The IL-5 mRNA level is associated with the time of severe edema formation in the ethmoid cavity. This finding permits early intervention on the postoperative course and would prevent polyp recurrence.