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2011, Volume 27, Number 3, Page(s) 221-229
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DOI: 10.5146/tjpath.2011.01079
General Evaluation of Hepatectomy and Hepatocellular Carcinoma Cases
Nuray BAŞSÜLLÜ1, İlknur TÜRKMEN1, Onur YAPRAK2, Murat DAYANGAÇ2, Tolga DEMİRBAŞ2, Necdet GÜLER2, Süleyman URAZ3, Murat AKYILDIZ4, Engin CİĞERCİOĞULLARI5, Yaman TOKAT2, Yıldıray YÜZER2, Gülen BÜLBÜL DOĞUSOY1
1Department of Pathology, İstanbul Bilim University, Faculty of Medicine, İSTANBUL, TURKEY
2Department of General Surgery Organ Transplantation, Şişli Florence Nightingale Hospital, İSTANBUL, TURKEY
3Department of Gastroenterology, Şişli Florence Nightingale Hospital, İSTANBUL, TURKEY
4Department of Gastroenterology, İstanbul Bilim University, Faculty of Medicine, İSTANBUL, TURKEY
5Department of Medical Pathology, Ağrı Maternity and Pediatric Hospital, AĞRI, TURKEY
Keywords: Transplantation, Cirrhosis, Hepatocellular carcinoma, Etiology
Abstract
Objective: Although the clinical and histopathological findings of hepatocellular carcinoma are well described, there are few national studies. In this study, we aimed to investigate the relationship between these findings in total or partial hepatectomy specimens in our series.

Material and Method: We first collected 190 cases of total or partial hepatectomies performed because of hepatocellular carcinoma, cirrhosis or other disorders from the archives of Pathology. After re-examining the histopathological and clinical features such as age, gender and etiology, the relationship between them and serology results were statistically analyzed using the chi square and Multiple Comparison Tests.

Results: Among 190 cases, there were 168 (88.5%) total and 18 (9.5%) partial hepatectomies and 4 (2%) tumorectomy or metastasectomy cases. After gross and microscopic examination, 170 (89.5%) cases had a diagnosis of cirrhosis, 85 (44.7%) hepatocellular carcinoma, 3 parasitic cyst, 7 metastasis, 1 hepatoblastoma, 1 hepatocellular adenoma, 2 cholangiocarcinoma, 2 Budd Chiari Syndrome, 1 focal nodular hyperplasia, 1 cavernous hemangioma, and 2 acute fulminant hepatitis.

Among the hepatocellular carcinoma cases, 53 had Hepatitis B virus, 15 Hepatitis C virus , 3 Hepatitis B virus and Hepatitis C virus, and 3 Hepatitis B virus and Hepatitis delta virus etiology, while 6 were alcoholic and 4 were due to other causes. Among cirrhosis patients, 84 (49.4%) had hepatocellular carcinoma. The male to female ratio of hepatocellular carcinoma cases was 74/11. The mean age was 55 and the median age 56.7.

Conclusion: The results of this study demonstrated that the most common hepatic disorder was cirrhosis due to Hepatitis B virus in the hepatectomy specimens of our series that mostly consisted of total hepatectomies performed for transplantation where 50% had hepatocellular carcinoma.

Introduction
Hepatocellular carcinoma (HCC) usually develops on the basis of chronic liver disease. The frequency of HCC is increasing in both developing and developed countries around the world and the disease has a poor prognosis1-6. It is the 5th most common tumor in the world 5th in men and 8th in women1,2. It ranks 3rd among cancer-related causes of death in developing countries1,2.

Cirrhosis is the major risk factor for HCC. The incidence and etiology of HCC varies depending on geographical regions. The most important cause is hepatitis B and hepatitis C infections. The other major causes are alcohol, aflatoxin exposure, hereditary hemochromatosis, primary sclerosing cholangitis, autoimmune hepatitis, and cryptogenic hepatitis3-5,7-10.

The frequency of HCC is significantly higher in the Asia and Africa continents and the incidence is increasing1,2,7,10. HBV is endemic in our country and the HBV carrier rate is 5-10%. The HCV incidence is reported to be 1.5%3. The relative incidence of HCC is 1.9% in men and 1.1% in women according to data from Turkish Ministry of Health Cancer Control Department between 2004-200611.

In our study, it was aimed to investigate the relationship in terms of age, gender, etiological and histopathological characteristics between specimens of total and partial hepatectomy from cases that had undergone transplantation because of HCC, cirrhosis and other chronic liver diseases and to compare our results with other studies conducted about this subject in our country and the world.

  • Top
  • Abstract
  • Introduction
  • Methods
  • Results
  • Disscussion
  • References
  • Methods
    Materials from total hepatectomy cases who underwent transplantation because of HCC, cirrhosis and other chronic liver diseases, partial hepatectomies performed in order to treat HCC, metastatectomy (process of removing with intact surgical edges a metastatic tumor that has spread to the liver from a primary tumor in a different organ) and tumorectomy (process of removing a primary tumor with intact surgical edges) in our Hospital's Department of General Surgery and Transplantation between 2008-2010 were collected. 190 cases of wich pathological examinations performed by us were included in the study. Age, gender and etiological factors of the cases were retrieved from patient files. After histopathological characteristics were re-evaluated, obtained data was processed into a SPSS data table. The relationships of the findings with each other and between the clinical findings were analyzed using the Chi-square, Pearson and Multiple Comparison tests. A p value <0,05 was accepted as significant. Histological grade was assessed as well-differentiated grade 1, moderately differentiated grade 2, poorly differentiated grade 3 and undifferentiated grade 4 according to the modified Edmondson and Steiner criteria12. Pathological staging was performed according to TNM, 7th edition12.
  • Top
  • Abstract
  • Introduction
  • Methods
  • Results
  • Disscussion
  • References
  • Results
    Among 190 cases, 168 (88.5%) had total, 18 (9.5%) partial hepatectomies and 4 (2%) tumorectomy or metastasectomy. The age range of the 149 male and 41 female cases was 2 to 78 and the mean age was 53.1.

    Cirrhosis was found in 170 cases (89.5%) (Figure 1A,B and 2), HCC in 85 cases (44.7%) (Figure 3A,B and 4A-D), hepatoblastoma in 1 case, hepatocellular adenoma in 1 case, cholangiocarcinoma in 2 cases, parasitic cyst in 3 cases, metastasis in 7 cases, Budd-Chiari syndrome in 2 cases, focal nodular hyperplasia and cavernous hemangioma in 1 case, and acute fulminant hepatitis in 2 cases after macroscopic and microscopic examinations (Table I).


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    Figure 1: Macroscopic appearance of the liver in patient with cirrhosis; external surface (A) and cut section (B).


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    Figure 2: Microscopic appearance of cirrhosis case (H&E; x 40).


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    Figure 3A,B: Macroscopic appearances of hepatocellular carcinoma cases that developed on the basis of cirrhosis.


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    Figure 4: Microscopic appearances of hepatocellular carcinoma cases (A: Grade I, H&E; x40, B: Grade II, H&E; x100, C: Grade II, H&E; x200, D: Grade III, H&E; x200).


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    Table I: Demographic characteristics of the cases

    The age range of the 62 male (72%) and 24 female (28%) cases who were diagnosed as cirrhosis without HCC was 12 to 72, the mean age was 50.9 and the median age was 51. The age range of the 74 male (87%) and 11 female (13%) cases (M/F ratio 6,7:1) diagnosed with HCC was 26 to 73 and the mean age was 56.7. Rate of HCC development on the basis of cirrhosis was significantly higher in males than females and between ages of 50-70 than other ages (p<0.05).

    Among the 170 cases with cirrhosis, viral factors were detected in 123 (72.5%), alcohol use in 16 (9.5%), and other etiological factors in 31 (18%). HBV was responsible for 87 cases (51%), HCV for 21 cases (12%), HBV and HCV together in 6 cases (3.5%), HBV and hepatitis delta virus (HDV) together in 6 cases (3.5%), and HBV infection and alcohol use in 3 cases (1.7%) (Table II).


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    Table II: Etiological factors of cirrhosis and hepatocellular carcinoma cases

    HCC had developed in 84 (49.5%) of 170 cases with cirrhosis. The cause was HBV in 53 HCC-developing cirrhotic cases (62.3%), HCV in 15 (17.6%), both viruses together in 3, HBV and HDV together in 3, alcohol in 6 cases, and other etiological factors in 4 cases. One of the HCC cases was of the fibrolamellar type and cirrhosis was not observed table. A significant relationship was found between gender and etiology, statistically. HBV was more common in male HCC cases (p<0.05). The age range was 26-73, the mean age 56.1 and M/F ratio 50/3 in HCC cases with HBV as the etiology. The age range was 48 to 71, the mean age 59.5 and the M/F ratio was 11/4 in cases with HCV. No statistically significant difference was found between HBV and HCV by age.

    A single mass was present in 40 (47%) HCC cases, and multiple masses in 45 (53%). The largest number of masses was 8 with 2 masses present in 18 cases (21%) and 3 or more tumoral nodules in 27 cases (32%). A significant difference was found between age and etiology with the number of masses. HBV was more common in multiple tumors (p<0.005). A single nodule was more common in patients aged 50-70 (p<0.001).

    Among HCC cases, 51 (60%) were located in the right lobe, 6 (7%) in the left lobe, 1 in the caudate, and 27 (32%) located in more than one lobe. Total hepatectomy was performed in 77 cases (91%), partial hepatectomy in 5 (6%) and tumorectomy in 3 cases (3%). A statistically significant difference was found between gender and tumor localization. The tumor was frequently located at the right lobe in male HCC cases (p<0.005).

    The smallest diameter of tumor was 0,6 cm, and the largest diameter was 27 cm in HCC cases and 71 cases (81%) had tumors over 2 cm, 10 cases (11%) tumors between 1-2 cm and 4 cases (5%) tumors smaller than 1 cm. No statistically significant relationship was detected between diameter and other parameters except for age and stage. Tumor diameter of 1-2 cm were significantly higher in patients aged between 50-70 than the other age groups (p<0.05). Tumor diameter was larger in patients at an advanced stage (p<0.0001).

    Grade 1 was detected in 11 cases (13%), grade 2 in 35 cases (41%), grade 3 in 15 cases (17%), and various grade areas in 19 cases (22%). The grade could not be evaluated in a total of 4 cases (5%) due to severe necrosis due to radiofrequency performed in 2 cases and chemoembolization performed in 2 cases before the transplantation. Necrosis was observed in 26 HCC cases (30.5%). As mentioned, treatmentrelated necrosis was present in nearly all of the tumor in 4 cases. Tumoral necrosis (non-therapeutic) was observed significantly more commonly in multiple tumors (p<0.05) and in higher grades (p<0.01).

    When the cases were evaluated according to pathological stage (pTNM), 8 cases (9%) were found to be stage 1, 33 cases (39%) stage 2, 15 cases (18%) stage 3, and 29 cases (34%) stage 4. The pathological stage demonstrated a statistically significant relationship with many other characteristics. HCC was detected to be at more advanced stages in males (p<0.005). The frequency of HBV was higher in patients with more advanced stages (p<0.05). The stage was more advanced in multiple tumors (p<0.0001) and in patients with right- and left-lobe involvement at the same time as expected and the diameter was significantly larger in patients at advanced stages (p<0.0001).

    Carcinoma metastasis in regional (perihilar or portohepatic) lymph nodes was present in 3 patients (3.5%) and tumor thrombus in the portal vein in 5 patients (5.8%). Lymph node involvement was significantly more common in patients between the ages of 50-70 than the other age groups (p<0.005).

    Clinical characteristics of patients other than cirrhosis and HCC is summarized in Table I and all the findings of the HCC cases and data obtained after the analyses with Pearson and Fisher's exact test are summarized in Table III.


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    Table III: Demographic, histopathological and statistical properties of hepatocellular carcinoma cases (n=85)

  • Top
  • Abstract
  • Introduction
  • Methods
  • Results
  • Disscussion
  • References
  • Discussion
    Hepatocellular carcinoma constitutes 80% of primary liver cancers and is the 5th most common tumor globally. It ranks 3rd in cancer-related deaths in developing countries and the incidence is increasing around the world1,2,7,10,13,14.

    The frequency and etiology of HCC show significant differences geographically. Europe and America are low risk, while Asia and Africa are high-risk regions1,2,7,8,13,15. Our country falls between these two groups3-6,11. More than 80% of HCC cases develop on the basis of cirrhotic chronic liver disease globally3-6,10,16-18. The presence of cirrhosis in the etiology of HCC has been reported as 74% and 87% in Turkey3,5. This ratio varies between 62- 75% in transplantation series7-10,13-22. It is 98.8% in our series.

    The rate of HCC development was reported as 15.4% in patients followed up because of cirrhosis, and 59% and 75% in cirrhosis cases that had transplantation14,18. It was found 49.5% in our series. HCC is found in high rates in transplantation cases because these patient populations mostly consist of cases that were transplanted due to cirrhosis and HCC8,9,18.

    When HCC is evaluated in terms of the risk factors in Turkey, studies indicate that viral hepatitis and HBV take first place. The rate of HBV in patients with HCC ranges from 31% to 65.7% in Turkey3-6,21,22. The HBV-related HCC rate is 95-99% in China10,18-20. It is 62.3% in our series that parallel to other studies from Turkey but is lower than the countries in the Far East.

    HCV took second place with 17.6% in patients with HCC in our study and this rate varies between 11 and 28% in publications from Turkey3-6,21,22. The incidence of HCV is 10-12% in the Far East10,18-20. HCV is the major factor responsible with a rate of 39-77% in developed countries9,13,16.

    The alcohol-related HCC rate was 7% in our series while it was 5.3-16% in other studies from our country3-5,21,22. Its rate is very high such as 25-66% in Western countries8,17.

    We have determined concurrence of HBV and HCV at a rate of 3,5%, concurrence of HBV and HDV at a rate of 3,5% and concurrence of HBV and alcohol use at a rate of 1.7% in the etiology of HCC. These findings are compatible with data from Turkey and around the world3-6,10,16,18,21,22.

    HCC has been reported to be more frequent in males and at advanced ages in various studies3-8,16. 87% of HCC cases were observed in males and the M/F ratio is 6.7:1, the mean age was 56.7 and the median age 55 in our study which are compatible with the literature. HBV-related HCC has been reported to be more common in males and in younger ages than HCV-related HCC3,4,10,18. Similarly, the age range of HBV-related HCC cases was 26-73, the mean age 56.1 and the M/F ratio 50/3 in our series. The age range of patients with HCV was 48-71, the mean age 59.5 and the M/F ratio 11/4. However, there was no statistically significant difference between HBV and HCV in terms of age. This finding is consistent with the study of Ozer et al.4.

    A single nodule has been reported at a rate of 49-84% and more than one nodule at 25-61% in HCC cases in the literature4,5,8,10,15-17, single nodule was observed in 47% of our cases. The maximum number of masses observed in our study was 8 and 2 masses were present in 21%, and 3 or more tumoral nodules in 32%. Similar to the literature, 60% of our HCC cases were localized in the right lobe and 32% were localized in more than one lobe8,10,16,18.

    The smallest tumor diameter was 0.6 cm and the biggest diameter 27 cm in our study; 84% of the cases had tumors over 2 cm, 11% between 1-2 cm and 5% <1 cm in the present study. These diameters are consistent with the tumor diameters in the literature4,5,10,16-18.

    Grade 2 HCC is reported at a rate of 44-66%10,13-20 in transplantation series; 41% of the cases were determined to be grade 2, 18% grade 3 and 13% grade 1 in our series.

    When cases were evaluated according to pathological stage, 9% cases were found to be stage 1, 39% stage 2, 18% stage 3, and 34% stage 4. Our data related to stages are consistent with data in our country and European countries5,9,17, while a smaller percentage cases (8.6%) were determined to be stage 4 in the USA16.

    Carcinoma metastasis in a regional (perihilar or portohepatic) lymph node has been reported at a rate of 0-3.4% in the literature10,17 and is 3.5% in our series. The presence of tumor thrombus in the portal vein was reported at a rate of 22 and 23.5 %16,18 while this rate is very low in our study (5.8%).

    When evaluated in terms of cirrhosis, the major cause is HCV8,9,13,15,17 and alcohol use8,13,16,17 in developed countries while it is HBV in Far Eastern countries and Turkey3-6,10,18-20-22. HBV is endemic in our country and the HBV carrier rate is 5-10%. The HCV incidence is reported to be 1.5%3. In the study of Uzunalimoglu et al.3, the HBV incidence was high in South, Southeast and central Anatolia while alcohol and HCV rates were found to be higher in western regions.

    In a study evaluating the etiology of cirrhosis in Turkey by years, the incidence of viral hepatitis was reported to increase from 48% to 55% between 1983 and 20016. There is no national publication exactly overlapping with our transplantation study but this rate is 42.8-74% in other countries14,19. The rate is 72.5% in our study.

    HBV was reported to lead to cirrhosis at a rate of 31-46%, HCV 11-36%, HDV 19%, and concurrent HBV and HCV 0.9-3.2% in Turkey4,6,21,22. HBV has been reported at a rate of 7.4%21 and 61.5%14 and HCV at 35.4%21 and 12.5%14 in transplantation series. These rates were 51% for HBV, 12.5% for HCV, 3.5% for HDV and 3.5% for concurrent HBV and HCV in our study. HBV therefore retains its importance in the development of cirrhosis in our region and HCV still ranks 2nd after HBV in the etiology of viral hepatitis-related cirrhosis.

    The alcohol-related cirrhosis rate is 16.5-25.9% in studies combining transplantation cases14,19. The contribution of alcohol to cirrhosis has been reported as 5.3-16% in our country4,6,21,22 and alcohol-related cirrhosis was observed to gradually decrease in timefrom 33% to 16%6. It was also found to rank second as the cause of cirrhosis with a rate of 9.5% in our study.

    Cirrhosis is more frequently observed in males in Turkey and the mean age has been reported to be 57.34,21,22. Cirrhosis mostly affects males at a rate of 89% and generally at a mean age of 48 to 50 in transplantation series14,19. We also found cirrhosis to be present in males at a rate of 80% and at a mean age of 54.

    In conclusion, this study indicates that cirrhosis is the most common liver disease in patients with liver transplantation, viral hepatitis is the most frequent factor in cirrhosis and HBV ranks first among the causes, and HCC develops approximately in 50% of transplanted cirrhosis cases in our center. These findings show that it is possible to control HBV hence HCC with methods of preventive medicine such as a national vaccination program. Studies including follow-up of cases, treatment responses and immunohistochemical characteristics will form the basis of projects intended to describe the biological behavior of these diseases in our country.

  • Top
  • Abstract
  • Introduction
  • Methods
  • Results
  • Discussion
  • References
  • References

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  • Abstract
  • Introduction
  • Methods
  • Results
  • Discussion
  • References
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