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Proposal of objective morphological classification system for hepatocellular carcinoma using preoperative multiphase computed tomography

  • Original Article—Liver, Pancreas, and Biliary Tract
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Abstract

Background

To establish a preoperative morphological classification system for hepatocellular carcinoma using multiphase computed tomography.

Methods

All consecutive patients who were diagnosed with hepatocellular carcinoma between 2004 and 2009 were enrolled, for a total of 232 patients. The concavity and convexity of each outer contour of hepatocellular carcinoma acquired from multiphase computed tomography were analyzed, and the area and depth of each indentation were quantified. The indentation area to tumor area ratio (s:S) and the s:S ratio multiplied by the indentation depth to indentation base ratio (s:S × d:t) were used as feature values reflecting the individual shapes.

Results

Using a hierarchical cluster analysis, the shapes were classified into three groups: Type I (smooth: n = 158), Type II (jagged: n = 63), and Type III (rough: n = 11). The 5-year survival rates for Types I, II, and III were 64, 53, and 0 %, respectively (I vs. II, P = 0.038; I vs. III, P = 0.001; II vs. III, P = 0.002). The 5-year disease-free survival rates for Types I, II, and III were 27, 23, and 0 %, respectively (I vs. III, P = 0.0003 and II vs. III, P = 0.008). Microscopic portal venous invasion was significantly more likely with Type III than with Type I or II (P < 0.001 and P = 0.001, respectively).

Conclusions

The newly developed semiautomatic computed tomography-based morphological classification system appears to provide a promising additional criterion for the prognostic categorization of patients with hepatocellular carcinoma.

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Acknowledgments

We thank Dr. Kousuke Ihara, Department of Electronics and Computer Science, Nihon University School of Science and Technology; Mr. Katsuhiko Sakurai; and Dr. Makiyo Ishiguro, Nihon University School of Medicine, for their technical support. This work was supported by a Nihon University Multidisciplinary Research Grant for 2011–2012 and by a Grant-in-Aid for Scientific Research (A) 24249068, Research (C) 25350856 from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japan.

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The authors declare that they have no conflict of interest.

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Correspondence to Tadatoshi Takayama.

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Nakayama, H., Takayama, T., Okubo, T. et al. Proposal of objective morphological classification system for hepatocellular carcinoma using preoperative multiphase computed tomography. J Gastroenterol 49, 1430–1437 (2014). https://doi.org/10.1007/s00535-013-0908-9

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  • DOI: https://doi.org/10.1007/s00535-013-0908-9

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