Abstract
Purpose
In radiofrequency ablation (RFA) for hepatocellular carcinoma (HCC), it is difficult to assess the ablative margin (AM) precisely by comparing pre- and post-RFA CT images. We prospectively studied the AMs using magnetic resonance imaging (MRI) with pre-administered superparamagnetic iron oxide (SPIO). SPIO is safe for kidney disease patients.
Materials and methods
Hepatocellular carcinoma patients were treated with RFA within 8 h of SPIO administration. On T2*-weighted MRI performed 4–7 days later, AM was visualized as a hypointense rim. The ablation status was classified as AM(+) if the rim completely surrounded the tumor, AM(0) if the rim was partly discontinuous without tumor protrusion, and AM(−) if the rim was partly discontinuous with tumor protrusion. The minimal thickness of AM was measured. AM(−) tumors were re-treated consecutively.
Results
In total, 85 HCCs ablated in 76 patients were evaluated. The local recurrence rate at 3 years was 2% for AM(+) tumors and 34% for AM(0) tumors (p < 0.01). In addition, no local recurrence was seen in the tumors with an AM of ≥ 2 mm.
Conclusion
MRI with pre-administered SPIO is useful for determining the AM precisely, and an AM of ≥ 2 mm is recommended for curative RFA.
Trial registration number
This study was registered with UMIN Clinical Trials Registry (UMIN 000025406).
This is a preview of subscription content, access via your institution.





References
- 1.
Cho YK, Rhim H, Noh S. Radiofrequency ablation versus surgical resection as primary treatment of hepatocellular carcinoma meeting the Milan criteria: a systematic review. J Gastroenterol Hepatol. 2011;26:1354–60.
- 2.
Livraghi T, Meloni F, Di Stasi M, Rolle E, Solbiati L, Tinelli C, et al. Sustained complete response and complications rates after radiofrequency ablation of very early hepatocellular carcinoma in cirrhosis: is resection still the treatment of choice? Hepatology. 2008;47:82–9.
- 3.
Feng K, Yan J, Li X, Xia F, Ma K, Wang S, et al. A randomized controlled trial of radiofrequency ablation and surgical resection in the treatment of small hepatocellular carcinoma. J Hepatol. 2012;57:794–802.
- 4.
Chen MS, Li JQ, Zheng Y, Guo RP, Liang HH, Zhang YQ, et al. A prospective randomized trial comparing percutaneous local ablative therapy and partial hepatectomy for small hepatocellular carcinoma. Ann Surg. 2006;243:321–8.
- 5.
Nakazawa T, Kokubu S, Shibuya A, Ono K, Watanabe M, Hidaka H, et al. Radiofrequency ablation of hepatocellular carcinoma: correlation between local tumor progression after ablation and ablative margin. Am J Roentgenol. 2007;188:480–8.
- 6.
Mori K, Fukuda K, Asaoka H, Ueda T, Kunimatsu A, Okamoto Y, et al. Radiofrequency ablation of the liver: determination of ablative margin at MR imaging with impaired clearance of ferucarbotran-feasibility study. Radiology. 2009;251:557–65.
- 7.
Hamm B, Staks T, Taupitz M, et al. Contrast-enhanced MR imaging of liver and spleen: first experience in humans with a new superparamagnetic iron oxide. J Magn Reson Imaging. 1994;4:659–68.
- 8.
Mori K, Takahashi N, Hiratsuka M, Shiigai M, Minami M, Oda T, et al. Detection of hepatic metastases using ferucarbotran-enhanced MR imaging: feasibility and diagnostic accuracy of three-dimensional sensitivity-encoding water-excitation multishot echo-planar sequence (3D-SWEEP). J Magn Reson Imaging. 2006;24:1110–6.
- 9.
Sasaki A, Kai S, Iwashita Y, Hirano S, Ohta M, Kitano S. Microsatellite distribution and indication for locoregional therapy in small hepatocellular carcinoma. Cancer. 2005;103:299–306.
- 10.
Ochiai T, Takayama T, Inoue K, Yamamoto J, Shimada K, Kosuge T, et al. Hepatic resection with and without surgical margins for hepatocellular carcinoma in patients with impaired liver function. Hepatogastroenterology. 1999;46:1885–9.
- 11.
Lee JW, Lee YJ, Park KM, Hwang DW, Lee JH, Song KB. Anatomical resection but not surgical margin width influence survival following resection for HCC, a propensity score analysis. World J Surg. 2016;40:1429–39.
- 12.
Llovet JM, Burroughs A, Bruix J. Hepatocellular carcinoma. Lancet. 2003;362:1907–17.
- 13.
Koda M, Tokunaga S, Miyoshi K, Kishina M, Fujise Y, Kato J, et al. Ablative margin states by magnetic resonance imaging with ferucarbotran in radiofrequency ablation for hepatocellular carcinoma can predict local tumor progression. J Gastroenterol. 2013;48:1283–92.
- 14.
Shibata T, Isoda H, Hirokawa Y, Arizono S, Shimada K, Togashi K. Small hepatocellular carcinoma: is radiofrequency ablation combined with transcatheter arterial chemoembolization more effective than radiofrequency ablation alone for treatment? Radiology. 2009;252:905–13.
- 15.
Tomonari A, Tsuji K, Yamazaki H, Aoki H, Kang JH, Kodama Y, et al. Feasibility of fused imaging for the evaluation of radiofrequency ablative margin for hepatocellular carcinoma. Hepatol Res. 2013;43:728–34.
- 16.
Tang H, Tang Y, Hong J, Chen T, Mai C, Jiang P. A measure to assess the ablative margin using 3D-CT image fusion after radiofrequency ablation of hepatocellular carcinoma. HPB. 2015;17:318–25.
- 17.
Wang XL, Li K, Su ZZ, Huang ZP, Wang P, Zheng RQ. Assessment of radiofrequency ablation margin by MRI-MRI image fusion in hepatocellular carcinoma. World J Gastroenterol. 2015;21:5345–51.
- 18.
Nishigaki Y, Hayashi H, Tomita E, Suzuki Y, Watanabe N, Watanabe S, et al. Usefulness of contrast-enhanced ultrasonography using Sonazoid for the assessment of therapeutic response to percutaneous radiofrequency ablation for hepatocellular carcinoma. Hepatol Res. 2015;45:432–40.
- 19.
Koda M, Tokunaga S, Okamoto T, Hodozuka M, Miyoshi K, Kishina M, et al. Clinical usefulness of the ablative margin assessed by magnetic resonance imaging with Gd-EOB-DTPA for radiofrequency ablation of hepatocellular carcinoma. J Hepatol. 2015;63:1360–7.
- 20.
Saxton RE, Huang A, Anzai Y, Castro DJ, Lufkin RB. Laser photothermal effects on stability and toxicity of magnetic resonance contrast agents. J Clin Laser Med Surg. 1995;13:363–6.
- 21.
Merkle EM, Goldberg SN, Boll DT, Shankaranarayanan A, Boaz T, Jacobs GH, et al. Effects of superparamagnetic iron oxide on radiofrequency-induced temperature distribution: in vitro measurements in polyacrylamide phantoms and in vitro results in a rabbit liver model. Radiology. 1999;212:459–66.
- 22.
Kakite S, Fujii S, Nakamatsu S, Kanasaki Y, Yamashita E, Matsusue E, et al. Usefulness of administration of SPIO prior to RF ablation for evaluation of the therapeutic effect: an experimental study using miniature pigs. Eur J Radiol. 2011;78:282–6.
- 23.
Nagai M, Yamaguchi M, Mori K, Furuta T, Ashino H, Kurosawa H, et al. Magnetic resonance-based visualization of thermal ablative margins around hepatic tumors by means of systemic ferucarbotran administration before radiofrequency ablation: animal study to reveal the connection between excess iron deposition and T2*-weighted hypointensity in ablative margins. Invest Radiol. 2015;50:376–83.
- 24.
Nayak AB, Luhar A, Hanudel M, Gales B, Hall TR, Finn JP, et al. High-resolution, whole-body vascular imaging with ferumoxytol as an alternative to gadolinium agents in a pediatric chronic kidney disease cohort. Pediatr Nephrol. 2015;30:515–21.
- 25.
Garcia-Tsao G, Parikh CR, Viola A. Acute kidney injury in cirrhosis. Hepatology. 2008;48:2064–77.
- 26.
D'Amico G, Garcia-Tsao G, Pagliaro L. Natural history and prognostic indicators of survival in cirrhosis: a systematic review of 118 studies. J Hepatol. 2006;44:217–31.
- 27.
Mikami S, Tateishi R, Akahane M, Asaoka Y, Kondo Y, Goto T, et al. Computed tomography follow-up for the detection of hepatocellular carcinoma recurrence after initial radiofrequency ablation: a single-center experience. J Vasc Interv Radiol. 2012;23(10):1269–75.
- 28.
Zhou P, Kudo M, Minami Y, Chung H, Inoue T, Fukunaga T, Maekawa K. What is the best time to evaluate treatment response after radiofrequency ablation of hepatocellular carcinoma using contrast-enhanced sonography? Oncology. 2007;72(Suppl 1):92–7.
- 29.
Watanabe H, Kanematsu M, Goshima S, Yoshida M, Kawada H, Kondo H, Moriyama N. Is gadoxetate disodium-enhanced MRI useful for detecting local recurrence of hepatocellular carcinoma after radiofrequency ablation therapy? AJR Am J Roentgenol. 2012;198(3):589–95.
- 30.
Midorikawa Y, Takayama T, Shimada K, Nakayama H, Higaki T, Moriguchi M, et al. Marginal survival benefit in the treatment of early hepatocellular carcinoma. J Hepatol. 2013;58:306–11.
- 31.
Li YW, Chen ZG, Wang JC, Zhang ZM. Superparamagnetic iron oxide-enhanced magnetic resonance imaging for focal hepatic lesions: systematic review and meta-analysis. World J Gastroenterol. 2015;21:4334–44.
Funding
This study was not supported by any grants.
Author information
Affiliations
Contributions
KM and KF contributed equally. Study concepts, data analysis and manuscript drafting: KF and KM; acquisition of data and clinical studies: all authors; statistical analysis: NH; critical revision of the manuscript for important intellectual content: MA, MM, and IH; manuscript editing and final approval: all authors.
Corresponding author
Ethics declarations
Conflict of interest
All authors declare no potential conflict of interest.
Ethical statement
This study was approved by the institutional ethics committee (H19-208) and was conducted in accordance with the ethical standards of the Declaration of Helsinki.
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
About this article
Cite this article
Fukuda, K., Mori, K., Hasegawa, N. et al. Safety margin of radiofrequency ablation for hepatocellular carcinoma: a prospective study using magnetic resonance imaging with superparamagnetic iron oxide. Jpn J Radiol 37, 555–563 (2019). https://doi.org/10.1007/s11604-019-00843-1
Received:
Accepted:
Published:
Issue Date:
Keywords
- Hepatocellular carcinoma
- Radiofrequency ablation
- Superparamagnetic iron oxide
- Ablative margin