title: Polypoidal lesions in the nasal cavity.
abstract: BACKGROUND
  Nasal polyps are polypoidal masses arising from mucous membranes of nose and paranasal sinuses. They are overgrowths of the mucosa that frequently accompany allergic rhinitis. They are freely movable and nontender.
  
  
  OBJECTIVE
  The purpose of this study was to study the histopathologic spectrum of polypoidal lesions of the nasal cavity.
  
  
  METHODS
  The study comprised of 100 consecutive cases of polypoidal lesions in the nasal cavity, received in the department of pathology. The age and sex of the patients were recorded. The tissues were routinely processed for histopathologic sections and stained with haematoxylin and eosin stains. Special stains like Periodic acid Schiff (PAS) was done wherever applicable. The cases were classified into neoplastic and nonneoplastic lesions. The neoplastic lesions were further classified according to WHO classification on histopathologic examination.
  
  
  RESULTS
  Analysis of 100 polypoidal lesions in the nose and paranasal sinuses with clinical diagnosis of nasal polyps, revealed 66 cases were nonneoplastic and 34 were neoplastic;17 (50%)were benign and 17(50%) were malignant. True nasal polyps both inflammatory and allergic together comprised 44 cases of the 100 polypoidal lesions in the nasal cavity. Angiofibroma and inverted papilloma were the most frequent benign tumour accounting for 12/17(0.7%). The most common malignant tumour was anaplastic carcinoma 7/17(0.4%). Nonneoplastic and benign tumours were common in younger age groups whereas malignant tumours were most common in older males.
  
  
  CONCLUSIONS
  The majority of polypoidal lesions in the nasal cavity are nonneoplastic.
authors.affiliation: Associate Professor, Department of Pathology, M.S. Ramaiah Medical College , Karnataka, India .
authors.forename: Kalpana
authors.initials: K
authors.lastname: Kumari M K
authors.forename: Mahadeva
authors.initials: M
authors.lastname: K C
keywords: Allergic; Angiofibroma; Inflammatory; Nasal cavity; Nonneoplastic; Polyps
references.citation: Rhinology. 1998 Mar;36(1):12-4
references.pmid: 9569435
references.citation: Indian J Pathol Microbiol. 1990 Apr;33(2):129-36
references.pmid: 2391143
references.citation: Indian J Dent Res. 2004 Oct-Dec;15(4):145-8
references.pmid: 16035644
references.citation: Singapore Med J. 2012 Feb;53(2):e24-7
references.pmid: 22337196
references.citation: Ther Clin Risk Manag. 2008 Apr;4(2):507-12
references.pmid: 18728843
references.citation: Indian J Pathol Microbiol. 2003 Jan;46(1):76-7
references.pmid: 15027732
references.citation: Int J Oral Maxillofac Surg. 2012 Nov;41(11):1378-82
references.pmid: 22771221
references.citation: Indian J Pathol Microbiol. 2008 Jan-Mar;51(1):26-9
references.pmid: 18417845
references.citation: Acta Otorhinolaryngol Ital. 2011 Dec;31(6):372-7
references.pmid: 22323848
references.citation: Indian J Otolaryngol Head Neck Surg. 1997 Jan;49(1):32-7
references.pmid: 23119246
references.citation: Case Rep Pathol. 2012;2012:101832
references.pmid: 23097732