Abstract
Objectives
To clarify the relationship between the biological behaviour of hepatocellular carcinomas (HCCs) and their signal intensity in the hepatobiliary phase of gadoxetic acid-enhanced MR imaging with a special focus on the signal heterogeneity.
Methods
A total of 68 patients with 70 pathologically proven HCCs were enrolled. On the basis of the signal intensity in the hepatobiliary phase, the lesions were classified into three groups: group 1, homogeneous hypointensity (n = 44); group 2, heterogeneous hyperintensity (n = 20); and group 3, homogeneous hyperintensity (n = 6). The clinicopathological findings were compared among the three groups.
Results
The tumour size and the serum level of protein induced by vitamin K absence or antagonist-II (PIVKA-II) were significantly higher in group 2 compared to group 1 (p = 0.0155, p = 0.0215, respectively) and compared to group 3 (p = 0.0330, p = 0.0220, respectively). The organic anion transporting polypeptide 8 (OATP8) expression in group 2 and group 3 was significantly higher than in group 1 (p < 0.0001, p < 0.0001, respectively). Group 2 showed a significantly lower disease-free survival rate compared to group 1 (p = 0.0125), and group 2 was an independent prognostic factor for disease-free survival (p = 0.0308).
Conclusions
HCCs in the hepatobiliary phase that are heterogeneously hyperintense on gadoxetic acid-enhanced MR imaging have more malignant potential than other types of HCCs.
Key Points
• Heterogeneous uptake of gadoxetic acid suggests more malignant potential in HCC
• Uptake of gadoxetic acid does not suggest less malignancy in HCC
• Evaluation of signal heterogeneity on gadoxetic acid-enhanced MR imaging is useful
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Abbreviations
- AFP:
-
alpha-fetoprotein
- HBP:
-
hepatobiliary phase
- HCC:
-
hepatocellular carcinoma
- MR:
-
magnetic resonance
- OATP:
-
organic anion transporting polypeptide
- PIVKA-II:
-
protein induced by vitamin K absence or antagonist-II
- ROI:
-
region of interest
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Acknowledgments
We thank Dr. Yoshihiko Maehara, Department of Surgery and Science, Kyushu University, for providing the clinical information for this manuscript. We also thank Dr. Yoshinao Oda, Department of Anatomic Pathology, Kyushu University, for providing the pathological information for this manuscript. This work was supported by a Grant-in-Aid for Scientific Research (C) (24591814) from the Japanese Ministry of Education, Culture, Sports, Science, and Technology. The scientific guarantor of this publication is Professor Hiroshi Honda. The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article. No complex statistical methods were necessary for this paper. Institutional review board approval was obtained. Written informed consent was waived by the institutional review board. Approval from the institutional animal care committee was not required because the study is not on animals. Some study subjects or cohorts have not been previously reported. Methodology: retrospective, diagnostic or prognostic study/observational, performed at one institution.
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Fujita, N., Nishie, A., Kubo, Y. et al. Hepatocellular carcinoma: clinical significance of signal heterogeneity in the hepatobiliary phase of gadoxetic acid-enhanced MR imaging. Eur Radiol 25, 211–220 (2015). https://doi.org/10.1007/s00330-014-3349-9
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DOI: https://doi.org/10.1007/s00330-014-3349-9