title: Use of KAI-1 as a prognostic factor in gastric carcinoma.
abstract: OBJECTIVE
  The purpose of this study was to investigate the expression level of KAI-1 in gastric carcinomas and compare with the clinicopathological characteristics.
  
  
  METHODS
  KAI-1 expressions were detected with immunohistochemical methods in 257 patients with gastric carcinomas.
  
  
  RESULTS
  KAI-1 was highly expressed in normal gastric epithelium, whereas only 86 of 257 (33.5%) patients with gastric carcinomas were KAI-1 positive. The expression levels, however, decreased with the loss of tumor differentiation, increase in tumor invasion depth, increase in the number of metastatic lymph nodes and perinodal invasions, and progression in the tumor stage. Distant metastatic and stage 4 tumors were all KAI-1 negative. All of these results were statistically significant (P<0.05). There were no correlations between KAI-1 expression and the other parameters such as age, sex, tumor location, tumor size, WHO, Lauren's and Bormann's classifications, neural and angiovascular invasion of the tumor and intestinal metaplasia in adjacent gastric mucosa (P>0.05).
  
  
  CONCLUSIONS
  Loss of KAI-1 may be considered a significant prognostic parameter in predicting the progression of the gastric carcinomas when evaluated along with the clinical and pathological parameters.
authors.affiliation: Ministry of Health Batman State Hospital, Pathology Laboratory, Batman, Turkey. drozgurilhan@gmail.com
authors.forename: Ozgür
authors.initials: O
authors.lastname: Ilhan
authors.forename: Serkan Yaşar
authors.initials: SY
authors.lastname: Celik
authors.forename: Unsal
authors.initials: U
authors.lastname: Han
authors.forename: Binnur
authors.initials: B
authors.lastname: Onal
mesh_terms: D014408:Biomarkers, Tumor / Q000378:metabolism*; D002454:Cell Differentiation; D005260:Female; D005753:Gastric Mucosa / Q000378:metabolism; D006801:Humans; D051861:Kangai-1 Protein / Q000378:metabolism*; D008207:Lymphatic Metastasis; D008297:Male; D009361:Neoplasm Invasiveness; D009363:Neoplasm Proteins / Q000378:metabolism; D009367:Neoplasm Staging; D011379:Prognosis; D012189:Retrospective Studies; D013274:Stomach Neoplasms / Q000175:diagnosis / Q000378:metabolism* / Q000473:pathology
chemical_list: D014408:Biomarkers, Tumor; C497688:CD82 protein, human; D051861:Kangai-1 Protein; D009363:Neoplasm Proteins