title: [Expression and mutation of c-kit gene in gastrointestinal stromal tumor].
abstract: OBJECTIVE
  To investigate the effect of the expression and mutation of c-kit gene and its relationship with clinical pathology and prognosis of gastrointestinal stromal tumor (GIST).
  
  
  METHODS
  Immunohistochemical and PCR-SSCP techniques were used to detect c-kit protein expression and c-kit gene exon 11 mutation in 82 patients with GIST.
  
  
  RESULTS
  The positive c-kit protein expression and c-kit gene mutation rates were 97.6% (80/82) and 41.5% (34/82). Correlating the results of these two methods and clinicopathological factors, the c-kit expression and c-kit gene mutation rates were 95.0% (19/20) and 0 in benign GIST, and were 98.4% (61/62), 54.8% (34/62) in malignant GIST. Mutation positive GIST showed higher frequency of adjacent tissue invasion, metastasis and recurrence as compared with mutation negative ones.
  
  
  CONCLUSIONS
  c-kit protein is an important diagnostic marker of gastrointestinal stromal tumor. c-kit gene mutation may play a significant role in the pathogenesis of GIST and also may be a prognostic marker.
authors.affiliation: Department of Pathology, Changhai Hospital, Second Military Medical University, Shanghai 200433, China.
authors.forename: Dalie
authors.initials: D
authors.lastname: Ma
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Liu
authors.forename: Zailong
authors.initials: Z
authors.lastname: Cai
authors.forename: Qiang
authors.initials: Q
authors.lastname: Xie
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D005770:Gastrointestinal Neoplasms / Q000175:diagnosis / Q000235:genetics* / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D009154:Mutation; D009362:Neoplasm Metastasis; D016133:Polymerase Chain Reaction; D018807:Polymorphism, Single-Stranded Conformational; D011379:Prognosis; D019009:Proto-Oncogene Proteins c-kit / Q000235:genetics*
chemical_list: D019009:Proto-Oncogene Proteins c-kit