INTRODUCTION: @entity4607 are @entity5 resulting from incorrectly differentiated germplasm and can manifest in different organ systems. In the nasal cavity and the sinuses these lesions are rare. Only few data on etiology, epidemiology and clinical significance of these @entity5 exist to date. MATERIALS AND METHODS: In a retrospective study, material from @entity1 treated in the Clinic for Otorhinolaryngology, Head and Neck Surgery of the Ulm Military Hospital was screened on the incidence and clinical courses of @entity1576 ( @entity1576 ) of the nose and nasal cavity. Furthermore, for cases of @entity1576 , @entity406 -fixated paraffin-embedded tissue samples were re-evaluated and examined for @entity1082 ) DNA by PCR. RESULTS: Tissue samples from 8145  surgical interventions on the nose and nasal sinuses from  2003 to  2012 were included. A total of 22  @entity1 (3  female, 19  male; median age 57.5  years) diagnosed with @entity1576 could be identified. Major complaints were nasal blockage (91   %), @entity1244 (82   %), @entity5254 (36   %) and @entity10 (23   %). Nasal endoscopy showed @entity1127 in 68   % of @entity1 . Native nasal sinus CT scans revealed no indications of @entity1576 . Intraoperatively, @entity4607 were found in 12  @entity1 originating from the ethmoid bone, in 8  from the middle meatus or infundibulum and in 2  from the olfactory cleft. Macroscopic and histological examination showed compact lesions sized between 4  and 25  mm in the largest diameter containing homologous tissue, without signs of @entity1141 or @entity5 . HPV DNA was not identified in any case. CONCLUSION: @entity1576 of the nasal cavity and sinuses are rare benign local tissue lesions, usually without any autonomous proliferation. Clinical signs and findings correspond to those in polypoid pansinusitis. Only with single-sided or olfactory cleft location might CT scans provide indication of a @entity5 . For differentiation from true @entity5 , surgical resection and histopathological clarification is indicated. On the basis of current knowledge, complete surgical resection is adequate therapy.

[Respiratory epithelial adenomatoid XXXX of the nose and nasal sinuses : A rare differential diagnosis of nasal polyposis].

@entity1 :: ('9606', 'Species') :: ['patients'] @entity1244 :: ('MESH:D012852', 'Disease') :: ['sinusitis'] @entity1127 :: ('MESH:D011127', 'Disease') :: ['polyps'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumorous lesion', 'benign tumor-like lesions', 'neoplasms', 'malignancy', 'tumors'] @entity406 :: ('MESH:D005557', 'Chemical') :: ['formalin'] @entity5254 :: ('MESH:D002559', 'Disease') :: ['rhinorrhea'] @entity1576 :: ('MESH:D012131', 'Disease') :: ['REAH', 'respiratory epithelial adenomatoid hamartomas'] @entity1082 :: ('10566', 'Species') :: ['human papillomavirus (HPV'] @entity10 :: ('MESH:D006261', 'Disease') :: ['cephalgia'] @entity4607 :: ('MESH:D006222', 'Disease') :: ['hamartomas', 'Hamartomas'] @entity1141 :: ('MESH:C535662', 'Disease') :: ['dysplasia']
@entity4607 :: (MESH:D006222,Disease) :: ['hamartoma']
