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Characteristics of hepatocellular carcinoma in Japan
1Second Department of Internal Medicine, Shinshu University School of Medicine, Matsumoto, Japan.
Insights
Hepatocellular carcinoma (HCC) is a leading cause of cancer death in Japan, with chronic hepatitis C virus infection being the primary driver. This rise in HCC is a current manifestation of widespread past hepatitis C virus infections.
Area of Science:
- Oncology
- Hepatology
- Epidemiology
Background:
- Malignant neoplasms are a primary cause of mortality in Japan.
- Hepatocellular carcinoma (HCC) is a significant cancer, ranking third in men and fourth in women.
- Annual HCC-related deaths have shown a sharp increase, reaching 33,000 in 1999.
Purpose of the Study:
- To investigate the rising incidence of Hepatocellular Carcinoma (HCC) in Japan.
- To identify the primary etiological factors contributing to the increasing HCC rates.
- To understand the historical context of Hepatitis C Virus (HCV) infection in Japan's socioeconomic background.
Main Methods:
- Epidemiological analysis of cancer mortality data in Japan.
- Review of etiological factors for Hepatocellular Carcinoma.
- Historical analysis of Hepatitis C Virus prevalence and socioeconomic factors.
Main Results:
- Chronic hepatitis C is identified as the predominant cause of HCC in Japan, accounting for nearly 90% of cases.
- The current surge in HCC is a long-term consequence of widespread past Hepatitis C Virus infections.
- Hepatitis C Virus infection prevalence has been significant since the post-World War II era, influenced by socioeconomic conditions.
Conclusions:
- Hepatitis C virus infection is the principal driver of the escalating Hepatocellular Carcinoma burden in Japan.
- The current epidemic of HCC is a delayed outcome of historical Hepatitis C Virus transmission.
- Understanding past socioeconomic factors is crucial for comprehending the Hepatitis C Virus epidemic and its link to HCC.
Abstract:
Malignant neoplasias are the leading cause of death in Japan at present, of which hepatocellular carcinoma (HCC) ranks the third most frequent in men and the fourth most frequent in women. Annual deaths due to HCC are rising sharply and amounted to 33,000 in 1999. Chronic hepatitis C is the most frequent etiology of HCC in Japan and accounts for nearly 90% of cases. The recent rapid increase of HCC in Japan is a long-term sequel of hepatitis C virus infection that affected many individuals in the past, and manifests itself currently as HCC. Infection with the hepatitis C virus has prevailed since the end of World War II for reasons inherent in the socioeconomic background in Japan.