Abstract
Objective
This study prospectively observed the incidence of all malignancies and the prognosis of all patients in a population of patients who achieved Sustained Virological Response (SVR) with a 100% capture rate.
Design
A prospective study of 651 SVR cases was conducted from July 2013 to December 2021. The primary endpoint was the occurrence of all malignancies, and the secondary endpoint was overall survival. The cancer incidence during the follow-up period was calculated using the man-year method, and risk factors were analyzed. In addition, sex- and age-matched standardized mortality ratio (SMR) was used to compare the general population with the study population.
Results
The overall median follow-up was 5.44 years. 107 malignancies occurred in 99 patients during the follow-up. The incidence of all malignancies was 3.94/100 person-years. The cumulative incidence was 3.6% at 1 year, 11.1% at 3 years, and 17.9% at 5 years, and continued to increase almost linearly. The incidence of liver cancer and non-liver cancer was 1.94/100 patient-years vs. 1.81%/100 patient-years. The 1-year, 3-year, and 5-year survival rates were 99.3%, 96.5%, and 94.4%, respectively. This life expectancy was compared to the standardized mortality ratio of the Japanese population, which proved non-inferior.
Conclusion
It was found that malignancies of other organs occur as frequently as hepatocellular carcinoma (HCC). Therefore, follow-up of patients who have achieved SVR should focus not only on HCC but also on malignant tumors of other organs, and lifelong follow could contribute prolonged life expectancy for the previously short-lived.
Graphical abstract
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Data availability
Ministry of Health, Labour and Welfare 2020 Vital Statistics. https://www.mhlw.go.jp/toukei/saikin/hw/**kou/houkoku20/l/03.pdf (accessed date 12 April 2022).
Abbreviations
- CAP:
-
Controlled attenuation parameter
- CI:
-
Confidence interval
- CT:
-
Computed tomography
- DAA:
-
Direct-acting antiviral
- HCC:
-
Hepatocellular carcinoma
- HCV:
-
Hepatitis C virus
- MRI:
-
Magnetic resonance imaging
- SMR:
-
Standardized mortality ratios
- SVR:
-
Sustained virological response
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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by SO, MK, YO, HO, RY, NS, HM, and MO. The first draft of the manuscript was written by SO and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Shuntaro Obi, Miho Kanda, Yoshihiko Ooka, Hiroshi Ohyama, Ritsuko Yokouchi, Naho Sato, Hitoshi Mochizuki and Masao Omata have no relevant financial or non-financial interests to disclose.
Ethical considerations
This study was conducted in accordance with the ethical guidelines of the 2013 Declaration of Helsinki and was approved by the Ethics Committee at the institution (Clinical 29–19).
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Informed consent was obtained in writing for the 50 cases treated in the clinical trial, [3, 4] and patient consent was obtained for the cases treated in post-marketing DAA clinical practice based on a comprehensive study of in-house electronic data.
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Obi, S., Kanda, M., Ooka, Y. et al. The incidence of all organ malignancies and overall survival of patient with sustained virological response of HCV-comparable to SMR (standardized mortality ratio) of Japan general population. Hepatol Int 17, 562–572 (2023). https://doi.org/10.1007/s12072-023-10495-z
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DOI: https://doi.org/10.1007/s12072-023-10495-z