Huge Hepatocellular Carcinoma Exhibiting a Complete Response after Stereotactic Body Radiation Therapy.

To date, there are limited data and little consensus on treatment strategies for huge hepatocellular carcinoma (HCC). Surgical resection provides significantly better survival than other modalities for single large HCC regardless of tumor stage. Recently, with technological advances in radiation therapy, stereotactic body radiation therapy (SBRT) is considered an alternative treatment option for HCC. Herein, we present a case of huge HCC that was successfully managed by SBRT. Transarterial embolization, previously performed in Russia, was incomplete. It was also not suitable for resection and transarterial chemoembolization. Although the rationale for radiotherapy in huge HCC was insufficient, SBRT was performed because no other treatment options were available. Additional radiofrequency ablation was performed for small HCC in a different segment, and radiological complete response (CR) was achieved. The CR was maintained over 4 years. Therefore, SBRT may be an alternative treatment option for large HCC that is not suitable for curative treatment.