Areas of sinusoidal surface hepatocyte nuclear predominance in type C chronic hepatitis.
OBJECTIVE
Thick hepatic plates have been considered one of the morphological characteristics of hepatocyte regeneration in cirrhotic nodules. They can be recognized by the sinusoidal surface predominance of their nuclei. We have investigated the prevalence of this in HBV and HCV infections.


RESULTS
This feature was more frequently present in type C chronic hepatitis with low activity of inflammation and low grade of fibrosis, than with type B chronic hepatitis. Additionally, this area of sinusoidal surface hepatocyte nuclear predominance (ASSHNP) was seen in zone II, rather than in periportal zones, in type C chronic hepatitis. Clinical data were analyzed statistically. Immunohistochemical reactivity of type IV collagen, laminin, Ulex europaeus agglutinin 1 lectin (UEA-1), and factor VIII-related antigen were increased in ASSHNP. Immunohistochemical staining of Ki-67 antigen was performed in order to assess the regenerative capacity of this area and showed a low level of regeneration. Ultrastructure of this area in type C chronic hepatitis showed a decrease in the number of mitochondria and an increase of nuclear pleomorphism together with basement membrane formation in the space of Disse.


CONCLUSIONS
Although the cause of these abnormalities was not clarified in this study, it is suggested that they are related to chronic hepatitis C virus (HCV) infection per se, rather than regeneration or inflammatory activity. These changes may be significant in HCV-associated hepatocarcinogenesis.
Tanaka
Y
Y
Department of Internal Medicine III, Niigata University School of Medicine, Niigata City, Japan.
Ichida
T
T
Nomoto
M
M
Matsuda
Y
Y
Asakura
H
H
D000328:Adult; D000368:Aged; D001485:Basement Membrane / Q000648:ultrastructure; D002467:Cell Nucleus / Q000473:pathology* / Q000648:ultrastructure; D003094:Collagen / Q000378:metabolism; D005260:Female; D019694:Hepatitis B, Chronic / Q000378:metabolism / Q000473:pathology*; D019698:Hepatitis C, Chronic / Q000378:metabolism / Q000473:pathology*; D006801:Humans; D007124:Immunoenzyme Techniques; D019394:Ki-67 Antigen / Q000378:metabolism; D007797:Laminin / Q000378:metabolism; D037102:Lectins / Q000378:metabolism; D008099:Liver / Q000378:metabolism / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D008928:Mitochondria / Q000648:ultrastructure; D037121:Plant Lectins; D014841:von Willebrand Factor / Q000378:metabolism
D019394:Ki-67 Antigen; D007797:Laminin; D037102:Lectins; D037121:Plant Lectins; C036850:Ulex europaeus lectins; D014841:von Willebrand Factor; D003094:Collagen