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Gross anatomic features of hepatocellular carcinoma from three disparate geographic areas. Proposal of new
Insights
Hepatocellular carcinoma (HCC) gross patterns varied across Japan, the US, and South Africa. These patterns correlated with prior liver disease, highlighting geographical differences in tumor presentation.
Area of Science:
- Hepatobiliary pathology
- Oncology
- Comparative pathology
Background:
- Hepatocellular carcinoma (HCC) is a primary liver cancer with diverse macroscopic appearances.
- Understanding gross patterns is crucial for diagnosis and prognosis.
- Geographical variations in HCC epidemiology are well-documented.
Purpose of the Study:
- To compare the gross pathological patterns of hepatocellular carcinoma (HCC) across different countries.
- To investigate the relationship between HCC gross patterns and pre-existing liver disease.
- To identify geographical variations in the frequency of specific HCC gross patterns.
Main Methods:
- Retrospective analysis of autopsy-derived HCC cases from Japan (378), the United States (90), and South Africa (61).
- Classification of tumors into major gross patterns: expanding, spreading, and multifocal, with subcategories.
- Correlation of gross patterns with documented prior liver disease status.
Main Results:
- Three major gross patterns (expanding, spreading, multifocal) were identified, requiring subclassification for distinct categorization.
- A significant relationship was observed between the gross pattern of HCC and the presence or absence of prior liver disease.
- Substantial differences in the frequency distribution of various gross HCC patterns were noted among the Japanese, US, and South African cohorts.
Conclusions:
- Hepatocellular carcinoma (HCC) exhibits distinct gross pathological patterns that can be classified.
- The observed variations in gross patterns are associated with underlying liver conditions and differ geographically.
- These findings underscore the importance of considering geographical origin and liver disease history in the characterization of HCC.
Abstract:
A comparison of the gross pattern of hepatocellular carcinoma (HCC) was made using autopsy material from Japan (378 cases), the United States (90 cases), and South Africa (61 cases). The tumor could be placed in three major gross patterns only if subcategories of each were created. The common major patterns were expanding, spreading, and multifocal. There was a relationship of gross pattern to the presence or absence of prior liver disease, and there were differences in frequency of occurrence of the various gross types in the material from the above-mentioned countries.