title: [Study of the route of intrahepatic metastasis of primary hepatic carcinoma].
abstract: OBJECTIVE
  To study the relationship between pylic countercurrent blood-flow and intrahepatic metastasis of hepatocarcinoma.
  
  
  METHODS
  Portal vein-hepatic artery fistula and pylic countercurrent blood flow in the liver were examined by color Doppler ultrasound. Patients examined were divided into four groups: group 1, hepatocarcinoma with background of hepatitis, group 2, hepatocarcinoma without background of hepatitis, group 3, hepatitis and group 4, normal liver.
  
  
  RESULTS
  Pylic countercurrent flood flow was most frequently observed in group 1 patients. Intrahepatic metastasis was more frequent in group 1 than in group 2 patients. There was no statistically significant difference in the frequency of portal vein-hepatic artery fistula formation around and inside of tumor between group 1 and group 2 patients.
  
  
  CONCLUSIONS
  Intrahepatic metastasis of hepatocarcinoma is due to countercurrent blood flow in the portal system.
authors.affiliation: General Hospital, Jinan Military Command, Jinan 250031, China.
authors.forename: L
authors.initials: L
authors.lastname: Dong
authors.forename: W
authors.initials: W
authors.lastname: Liu
authors.forename: X
authors.initials: X
authors.lastname: Zhao
mesh_terms: D001653:Bile Ducts, Intrahepatic / Q000473:pathology*; D006528:Carcinoma, Hepatocellular / Q000473:pathology* / Q000556:secondary; D005260:Female; D006801:Humans; D008099:Liver / Q000098:blood supply / Q000473:pathology; D008113:Liver Neoplasms / Q000473:pathology* / Q000556:secondary; D008297:Male; D008875:Middle Aged; D012039:Regional Blood Flow; D018615:Ultrasonography, Doppler, Color