Simultaneous segmental obstruction of bile duct and portal vein markedly changes a population of biliary and hepatic cells in human liver.
OBJECTIVE
No studies have investigated histologic changes caused by simultaneous segmental obstruction of the bile duct and portal vein in human liver.


METHODS
Liver tissues with simultaneous obstruction of the segmental bile duct and portal vein (O(+/+) liver), with segmental bile duct obstruction alone (O(+/-) liver), and without obstruction (O(-/-) liver) were obtained from patients who underwent hepatectomy, and studied morphologically and immunohistochemically.


RESULTS
In O(+/+) liver, the proportional area consisting of hepatocytes was significantly less (31.0+/-25.8%) than in O(+/-) liver (78.4+/-18.9%) or O(-/-) liver (86.5+/-9.2%). In contrast, the proportional area consisting of biliary epithelial cells was significantly higher in O(+/+) liver (9.1+/-6.1%) than in O(+/-) liver (1.6+/-1.5%) or O(-/-) liver (0.7+/-0.6%). The proportional area consisting of fibrous tissue also was significantly higher in O(+/+) liver than in the other two groups. In O(+/+) liver, some cells located at the periphery of hepatocyte areas were immunoreactive for both hepatocyte and biliary epithelial cell markers.


CONCLUSIONS
Simultaneous segmental obstruction of the bile duct and portal vein induces a marked ductular increase, periportal fibrosis, and a reduction in the number of hepatocytes in human liver tissue.
First Department of Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Syowa-ku, 466-8550 Nagoya, Japan. tkyokane@med.nagoya-u.ac.jp
Takanori
T
Kyokane
Masato
M
Nagino
Junichi
J
Kamiya
Yuji
Y
Nimura
Tetsuro
T
Nagasaka
D001650:Bile Duct Neoplasms / Q000150:complications; D001653:Bile Ducts, Intrahepatic; D006528:Carcinoma, Hepatocellular / Q000150:complications / Q000473:pathology; D002452:Cell Count; D018281:Cholangiocarcinoma / Q000150:complications; D002779:Cholestasis / Q000378:metabolism / Q000473:pathology*; D005355:Fibrosis; D022781:Hepatocytes; D006801:Humans; D007150:Immunohistochemistry; D008099:Liver / Q000473:pathology*; D008113:Liver Neoplasms / Q000150:complications / Q000473:pathology; D009361:Neoplasm Invasiveness; D011169:Portal Vein