title: [Expression of PDGFR-alpha in gastrointestinal stromal tumor and its clinical significance].
abstract: To investigate the expression and clinical significance of platelet-derived growth factor receptor alpha (PDGFR-alpha) in gastrointestinal stromal tumor (GIST).
  
  
  
  Paraffin embedded tissue specimens from 119 GISTs were analyzed for PDGFR-alpha expression by immunohistochemical method, and specimens from non-GISTs were used as controls. Positive signals were shown in cytoplasma and cell membrane.
  
  
  
  Of 119 GISTs,78 (65.5%) were positive for PDGFR-alpha . The expression rate of PDGFR-alpha protein in very low risk, low risk, intermediate risk and high risk cases was 52.9 % (9/17), 71.0% ( 22/31), 67.9% (19/28) and 65.1% (28/43), respectively (P>0.05). PDGFR-alpha protein expression rate was significantly different between GISTs and non-GISTs (P<0.05).
  
  
  
  PDGFR-alpha combined with CD117 can be used in diagnosis and differential diagnosis of GIST, but it may not be used as a prognostic index.
authors.affiliation: The Second Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310009, China.
authors.forename: Song
authors.initials: S
authors.lastname: Zheng
authors.forename: Li-rong
authors.initials: LR
authors.lastname: Chen
authors.forename: Hai-jun
authors.initials: HJ
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000096:biosynthesis; D005260:Female; D046152:Gastrointestinal Stromal Tumors / Q000378:metabolism* / Q000473:pathology*; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D008875:Middle Aged; D019009:Proto-Oncogene Proteins c-kit / Q000096:biosynthesis; D020796:Receptor, Platelet-Derived Growth Factor alpha / Q000096:biosynthesis*
chemical_list: D014408:Biomarkers, Tumor; D019009:Proto-Oncogene Proteins c-kit; D020796:Receptor, Platelet-Derived Growth Factor alpha