Respiratory Epithelial Adenomatoid Hamartoma is Frequent in Olfactory Cleft after Nasalization.

ObjectivesTo assess the site and histopathology of polyps at the first revision surgery for recurrent nasal polyposis (NP) after radical ethmoidectomy (nasalization).Study DesignRetrospective study.MethodsBetween January 2008 and December 2015, a total of 62 patients having undergone revision surgery for recurrent NP after nasalization were included. The site and histology of the recurrence of polyps were analyzed according to operative and pathological reports.ResultsHistology showed classical inflammatory nasal polyps (CINP) in 91% of nasal cavities at primary surgery versus respiratory epithelial adenomatoid hamartoma (REAH) or REAH associated to CINP in 54.8% at revision surgery (P < .0001). Polyps were principally observed in the ethmoidal complex in 70% of nasal cavities during primary surgery and in the olfactory clefts in 88.7% during revision surgery (P < .0001). The mean interval between nasalization and first revision surgery was 8.8 ± 4.4 years (0.4–21.7 years). This interval was significantly shorter for grade 3 polyps, polyps removed from both ethmoidal complex and olfactory cleft at primary surgery, association of CINP and REAH at primary surgery, and when primary surgery had preserved the middle turbinates.ConclusionPolyp recurrences after nasalization were mainly observed in the olfactory clefts and can be different histological features: inflammatory polyps, respiratory epithelial adenomatoid hamartoma, or a combination of both.Level of Evidence4 Laryngoscope, 130:2098–2104, 2020