title: Lectin immunohistochemistry study of nasal inverted papilloma and associated neoplasms.
abstract: BACKGROUND
  We aimed to investigate the tumor biology of nasal IP and identify the biological characteristics associated with early diagnosis and malignant transformation.
  
  
  METHODS
  Lectins immunohistochemistry were performed on inverted papilloma (IP), and associated neoplasms. IP synchronized with polyp or squamous cell carcinoma (SCC) and IP metachronized with SCC were analyzed and correlated to clinical information.
  
  
  RESULTS
  Canavalia ensiformis (ConA) and Arachis hypogaea (PNA) with neuraminidase pretreatment (NA-PNA) showed similar staining in both the IP and SCC portions of the IP synchronized with SCC. The IP and polyp portions of an IP synchronized polyp had positive NA-PNA staining, while papilloma and polyps alone had negative staining. Strong NA-PNA staining in the IP (transformed to SCC) showed significant differences from IP.
  
  
  CONCLUSIONS
  These biological characteristics define IP as a premalignant neoplasm. NA-PNA staining may be helpful for an early detection of IP. Strong NA-PNA staining in IP may predict malignant transformation.
authors.affiliation: Department of Otolaryngology, Faculty of Medicine, National Cheng Kung University, Tainan, Taiwan. sheen@mail.ncku.edu.tw
authors.forename: S Y
authors.initials: SY
authors.lastname: Fang
authors.forename: Y T
authors.initials: YT
authors.lastname: Jin
authors.forename: M
authors.initials: M
authors.lastname: Ohyama
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006001:Glycoconjugates / Q000032:analysis*; D006801:Humans; D007150:Immunohistochemistry; D037102:Lectins; D008297:Male; D008875:Middle Aged; D009298:Nasal Polyps / Q000737:chemistry; D009669:Nose Neoplasms / Q000737:chemistry*; D018308:Papilloma, Inverted / Q000737:chemistry*; D012189:Retrospective Studies
chemical_list: D006001:Glycoconjugates; D037102:Lectins