Three Cases of Hepatocellular Carcinoma With Massive Macrovascular Invasion Successfully Treated With Radiotherapy.

In clinical practice, the treatment approach for hepatocellular carcinoma (HCC) with macrovascular invasion (MVI) is determined on a case-by-case basis. The common management options include systemic and local therapies, although the former is the more widely accepted approach. We present three cases of HCC with MVI successfully treated with radiotherapy. The first patient was a 62-year-old man with Child-Pugh A cirrhosis who had a 5.7-cm treatment-naïve HCC invading the bilateral branches of the portal vein. Stereotactic body radiotherapy (SBRT) was administered, with no evidence of recurrence observed at the 24-month follow-up. The second patient was an 81-year-old man with Child-Pugh A cirrhosis who had a 3.8-cm HCC invading the inferior vena cava (IVC). Transcatheter chemoembolization performed one month earlier had been ineffective, and the tumor had grown rapidly. SBRT was administered, and no evidence of recurrence was observed up to his death from pneumonia 24 months after the treatment initiation. The third patient was a 72-year-old man with Child-Pugh A cirrhosis who had a 6.7-cm treatment-naïve HCC with portal vein tumor thrombosis (PVTT) from the main trunk to the secondary branches of both lobes. PVTT was treated with hypofractionated radiotherapy, while the primary HCC and intrahepatic recurrent lesions were subsequently treated with hepatic arterial infusion chemotherapy (HAIC) and five rounds of ablation. Six months after the last ablation (48 months after initial therapy), no evidence of recurrence was observed. Our cases illustrate that radiotherapy leads to the successful treatment of HCC with MVI.