title: Analysis of clinicopathologic features and prognostic factors in hepatoid adenocarcinoma of the stomach.
abstract: OBJECTIVE
  To investigate the different nature between hepatoid adenocarcinoma of the stomach (HAS) and common stomach cancer without the hepatoid differentiation areas (non-HAS).
  
  
  METHODS
  From January 1996 to December 2007, 45 patients were diagnosed as HAS on the basis of the characteristic histologic features resembling hepatocellular carcinoma in Fudan University Shanghai Cancer Center. The clinicopathologic features and the relevant prognosis of these patients were evaluated. In addition, 225 stage-matched common stomach cancer patients were selected as controls.
  
  
  RESULTS
  Histologically, the polygonal tumor cells were arranged in trabecular fashion or solid nests separated by narrow fibrous stroma composed of sinusoid-like capillaries. Immunohistochemically, the tumor cells were positive for α-fetoprotein. Under transmission electron microscope, numerous circular granules of dense electron were found in the cytoplasm. HAS showed a higher rate of vascular invasion, lymph node metastasis, and liver metastasis than non-HAS. The 5-years survival rates of HAS and non-HAS were 9% and 44%, respectively. The prognosis of HAS was poorer than that of non-HAS (P<0.05).
  
  
  CONCLUSIONS
  HAS had different clinicopathologic features and prognosis from non-HAS.
authors.affiliation: Department of Abdominal Surgery, Fudan University Shanghai Cancer Center, China.
authors.forename: Xiaowen
authors.initials: X
authors.lastname: Liu
authors.forename: Yufan
authors.initials: Y
authors.lastname: Cheng
authors.forename: Weiqi
authors.initials: W
authors.lastname: Sheng
authors.forename: Hongfen
authors.initials: H
authors.lastname: Lu
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Xu
authors.forename: Yu
authors.initials: Y
authors.lastname: Xu
authors.forename: Ziwen
authors.initials: Z
authors.lastname: Long
authors.forename: Huiyan
authors.initials: H
authors.lastname: Zhu
authors.forename: Yanong
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000230:Adenocarcinoma / Q000378:metabolism / Q000401:mortality / Q000473:pathology*; D014408:Biomarkers, Tumor / Q000378:metabolism; D006528:Carcinoma, Hepatocellular / Q000378:metabolism / Q000401:mortality / Q000473:pathology*; D002681:China / Q000453:epidemiology; D003593:Cytoplasm / Q000648:ultrastructure; D005260:Female; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D046529:Microscopy, Electron, Transmission; D008875:Middle Aged; D009367:Neoplasm Staging; D011379:Prognosis; D012189:Retrospective Studies; D013274:Stomach Neoplasms / Q000378:metabolism / Q000401:mortality / Q000473:pathology*; D015996:Survival Rate
chemical_list: D014408:Biomarkers, Tumor