Kupffer cells are tissue macrophages (histiocytes) fixed in hepatie sinusoids. Since malignant hepatocytes are the only tumor parencymal cells of the hepatocellular carcinoma, theoretically there are no Kupffer cells within the hepatocellular carcinoma. To clarify whether it is true or not, 12 cases of hepatocellular carcinoma of the trabecular type with some extents of the non-neoplastic surrounding liver were subjected to immunoperoxidase staining for lysozyme and S-100 protein and the results are as follows. 1) Kupffer cells were stained positively by the immunoperoxidase staining for lysozyme but not for S-100 protein, indicating that they are monocyte derived macrophages. 2) Kupffer cells were also present within the hepatocellular carcinoma, but were 2-7 times fewer within the hepatocellular carcinoma than in the non-neoplastic areas (p<0.05). 3) The non-neoplastic hepatic tissue of patients with serum HBsAg shows a tendency to have more kupffer cells than those without HBsAg.
Carcinoma, Hepatocellular

Since the discovery of hepatitis B virus as one of the causes of hepatitis, liver and hepatocellular carcinoma, many hepatitis B viral markers that appear in infected individuals have been discovered and many efforts to understand the relationship between the emergence of viral markers and the progression of hepatitis have been performed. Gudat (1975) compared the expression of HBcAg and HBsAg in various conditions and stages of hepatitis but the pattern of expression of viral markers and its significance have not been understood. Recently it was found by mierocytotoxicity assay that HBcAg might be the target of T lymphocytes. This study attempted to identify any correlation of the tissue expression rate and pattern of HBcAg and HBsAg with the histologic activity of 46 cases of liver cirrhosis using immunohistochemical staining. The expression rate and pattern of HBcAg and HBsAg in relation to the nodular size and positivity of serum HBeAg were also compared. The results were as follows; 1) The expression rate of HBcAg in the liver was 41.3% (19/46). and that of HBsAg was 67.4% (31/46). 2) The histologic activity of liver cirrhosis appeared to be correlated with the expression of HBcAg, especially cytoplasmic HBcAg. 3) The positivity of serum HBeAg was significantly higher in active liver cirrhosis. 4) There was no relationship between the tissue expression of HBsAg and the histologic activity of liver cirrhosis. relationship existed between the nodular size and expression rate and pattern of HBcAg and HBsAg. This study suggests that the tissue HBcAg, especially the cytoplasmic HBcAg is the most likely factor determining the histologic activity of liver cirrhosis, and that the cytoplasmic HBcAg may be the ultimate cause and target of most host immune response.
Carcinoma, Hepatocellular

No abstract availalbe.
Carcinoma, Hepatocellular*

This report presents a case of an atypical nodule arising in a hepatocellular adenoma(HCA) in a non-cirrhotic liver of a 42-year-old man. The patient had been relatively healthy until he developed right upper abdominal pain. Abdominal sonography and computerized tomogram revealed a 7.5x7cm sized mass in the right inferior segment of liver. The mass revealed the histologic features of HCA. At near center of the HCA, was found a I cm sized discrete nodule, a nodule within a nodule. The nodule revealed higher cellularity than the HCA and was composed of monotonous hepatocytes with an increased nuclear-cytoplasmic ratio, resembling atypical adenomatous hyperplasia. Interestingly, the atypical nodule showed a focal pseudoacinar arrangement of tumor cells. The histologic features of the atypical nodule arising in HCA may the morphological sequence of transformation from HCA to hepatocellular carcinoma
Carcinoma, Hepatocellular

No abstract available.
Carcinoma, Hepatocellular*

To pursue a desirable format for the pathological diagnosis of liver cirrhosis, the authors attempted to classify 369 biopsy-proven cirrhosis on the basis of etiology and made effort to find out the morphological characteristics of each category. About 735 of total cases were HBsAg seropositive postnecrotic cirrhosis. Alcholic cirrhosis ws the second most frequent type, although accounted only 6.8%. In about 15%, the etiology was not known. Excluding the congenital biliary atresia, chronic biliary obstruction appeared to be a rare cause of cirrhosis among these biopsied cases. Of the HBsAg positive postnecrotic cirrhosis, the eAg seropositive cases tended to be micronodular and to show a higher necroinflammatory activity, in contrast to eAg seronegative cases and those complicated by hepatocellular carcinoma (HCC), suggesting that the loss of eAg is followed by a decrease of the destructive activity, active regeneration of hepatocytes and finally the development of HCC. alcoholic cirrhosis was micronodular in 64% and revealed histologic evidences of alcoholic liver disease in most cases. The results indicate that etiological diagnosis can be made in most cases of cirrhosis by the morphological characteristics and the precise clinical informations, including those on the NANB virus and the inborn error of metabolism, and that the pathological diagnosis should be more comprehensive, implicating the etiology, the nodular size and the necroinflammatory activity.
Carcinoma, Hepatocellular

No abstract available.
Carcinoma, Hepatocellular*

No abstract availalbe.
Carcinoma, Hepatocellular*

No abstract available.
Carcinoma, Hepatocellular*

Forty-nine lobectomized hepatocellular carcinomas(HCC) were classified according to the gross anatomical features. Because the presence of cirrhosis in the remaining liver has a good clinico-pathological implication, cases of HCC were divided into non-cirrhotic(non-LC) and cirrhotic(LC) groups. In both groups, the tumors themselves belonged to either expanding, focal spreading, spreading or mixed type. Another special type, which has been called a "diffuse type" is added in the LC group with the name of "cirrhotomimetic type" Among 49 cases, 21 belonged to the non-LC group and 28 to the LC group. Most common was expanding type(20 cases, 40.8%), which was followed by spreading(32.7%), focal spreading(16.3%), mixed(6.1%) and cirrhotomimetic(4.1%) types. Expanding type of the LC group was the single most common type(13 cases, 26.5%). The accordance rate of gross typing was 0.94. Tumor masses of the LC group showed a greater tendency of having a fibrous capsule(60.7%) and a lobulated cut surface(82.1%), in contrast to those of the non-LC group (28.6% and 42.9% respectively). The patient's age and the HBsAg seropositivity were not different between the groups and between the types. Increased serum level of AFP was particularly frequent in the spreading type(81.3%) of both groups and in the cirrhotomimetic type(100%).
Carcinoma, Hepatocellular