Abstract
Objectives
To evaluate the therapeutic efficacy of and vascular complications associated with percutaneous cryoablation for the treatment of perivascular HCC.
Methods
Between August 2015 and September 2017, 58 consecutive patients (48 men, 10 women; mean age, 61.1 years; age range, 44–84 years) who underwent percutaneous cryoablation were included. All patients had a single perivascular HCC (mean size, 1.3 cm; Barcelona clinic liver cancer-stage 0 or A) that was in contact with hepatic vessels, ≥ 3 mm or larger in axial diameter. Local tumour progression (LTP) was estimated by the Kaplan-Meier method. In addition, several procedure-related vascular complications were evaluated immediately after treatment and during follow-up CT: peritumoral vessel thrombosis; infarction; aggressive intrasegmental recurrence (AIR) (the simultaneous development of ≥ 3 nodular or infiltrative tumours). The follow-up CT was performed in all patients 1 month after the procedure, and every 3 months thereafter.
Results
The median follow-up period was 22 months (range, 3–29 months). The technical success rate of cryoablation was 96.6% (56/58). The 1- and 2-year cumulative LTP rates were 3.6% and 14.6%, respectively. Although peritumoral vessel thrombosis occurred in 6.9% of cases (4/58), no cases of hepatic infarction were observed and AIR did not develop during follow-up. Half of the thombi in the peritumoral vessels immediately after cryoablation disappeared on follow-up CT images.
Conclusion
Cryoablation could be an effective tool for the treatment of perivascular HCC with a very low risk of vascular complications.
Key Points
• Cryoablation allowed a high technical success rate for perivascular HCC.
• Only 6.9% developed peritumoral vessel thrombosis without major vascular complications like infarction.
• Two-year cumulative LTP rate was 14.6%, without aggressive tumour recurrence on follow-up.
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Abbreviations
- BCLC:
-
Barcelona clinic liver cancer-stage
- CI:
-
Confidence interval
- CT:
-
Computed tomography
- HCC:
-
Hepatocellular carcinoma
- LTP:
-
Local tumour progression
- MR:
-
Magnetic resonance
- RF:
-
Radiofrequency
- TACE:
-
Transarterial chemoembolisation
- US:
-
Ultrasound
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The scientific guarantor of this publication is Won Jae Lee.
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The authors of this paper declare no relationships with any companies whose products or services may be related to the subject matter of the article.
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Written informed consent was waived by the Institutional Review Board.
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Methodology
• Retrospective
• Observational
• Performed at one institution
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Kim, R., Kang, T.W., Cha, D.I. et al. Percutaneous cryoablation for perivascular hepatocellular carcinoma: Therapeutic efficacy and vascular complications. Eur Radiol 29, 654–662 (2019). https://doi.org/10.1007/s00330-018-5617-6
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DOI: https://doi.org/10.1007/s00330-018-5617-6