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Is the Cancer of the Liver Italian Program system an adequate weighting for survival of hepatocellular carcinoma? Evaluation of intrascore prognostic value among 36 subgroups

Authors

  • Chih-Yun Lin,

    1. Department of Internal Medicine, Division of Hepatogastroenterology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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  • Kwong-Ming Kee,

    1. Department of Internal Medicine, Division of Hepatogastroenterology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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  • Jing-Houng Wang,

    1. Department of Internal Medicine, Division of Hepatogastroenterology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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  • Chuan-Mo Lee,

    1. Department of Internal Medicine, Division of Hepatogastroenterology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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  • Chao-Long Chen,

    1. Department of Surgery, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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  • Chi-Sin Changchien,

    1. Department of Internal Medicine, Division of Hepatogastroenterology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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  • Tsung-Hui Hu,

    1. Department of Internal Medicine, Division of Hepatogastroenterology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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  • Yu-Fan Cheng,

    1. Department of Radiology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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  • Hsuan-Chih Hsu,

    1. Department of Radiation Oncology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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  • Chih-Chi Wang,

    1. Department of Surgery, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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  • Tai-Yi Chen,

    1. Department of Radiology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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  • Sheng-Nan Lu

    1. Department of Internal Medicine, Division of Hepatogastroenterology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan
    2. Xiamen Chang Gung Hospital, Xiamen, Fujian, China
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Correspondence
Sheng-Nan Lu, Department of Internal Medicine, Division of Hepatogastroenterology, Kaohsiung Chang Gung Memorial Hospital, 123 Ta Pei Road, Niao Sung 833, Kaohsiung, Taiwan
Tel: +886 7 731 7123 ext. 8301
Fax: +886 7 732 2402
e-mail: juten@ms17.hinet.net

Abstract

Background: The Cancer of the Liver Italian Program (CLIP) staging system for hepatocellular carcinoma (HCC) was subdivided into 36 subgroups. We aimed to validate the prognostic value of CLIP scoring.

Methods: This study included 3868 HCC cases treated between 1986 and 2002. Survival and prognostic impact of all subgroups were analysed.

Results: In primary CLIP, comparisons of each score showed a significant difference (P<0.001) and exhibited a linear trend (P<0.001). A CLIP score of 0 was used as control group. Portal vein thrombosis, Child–Pugh B, α-fetoprotein (AFP) ≥400 ng/ml and multinodular with tumour extension ≤50% of the four subgroups with a CLIP score of 1 exhibited decreasing univariate hazard ratios and 95% confidence intervals, with values of 2.99 (2.05–4.37), 2.39 (2.00–2.86), 1.66 (1.40–1.96) and 1.39 (1.18–1.63) respectively. Homogeneity in the same score was evaluated by comparing subgroup survival curves. For scores 1–5, 83.3% (5/6), 57.1% (16/28), 24.4% (11/45), 3.6% (1/28) and 16.7% (1/6) pairs of survival curves significantly differed, respectively, with decreasing linear trend (P<0.001).

Conclusion: Different prognostic weighting of four predictive factors caused intrascore heterogeneity. Lower CLIP scores were associated with increased differences in intrascore. In conclusion, the CLIP staging scoring system is a reasonable ordinal scale, but the clinician must be aware of the heterogeneity of mortality risk within a given score.

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