In the HAIC group, patients were treated using a 3-week cycle regimen. A catheter was advanced into the hepatic artery according to our previously reported protocol [16 (link)]. A microcatheter was selectively placed into the feeding arteries of the tumor. The gastroduodenal artery was occluded by a coil when necessary. Then, the microcatheter was connected to the artery infusion pump to administer the following treatment: OXA, 85 mg/m2 intra-arterial infusion on day 1; LV, 400 mg/m2 intra-arterial infusion on day 1; and 5-FU, 400 mg/m2 bolus infusion on day 1 and 2400 mg/m2 continuous infusion over 46 h. After HAIC was completed, the indwelling catheter and the sheath were removed, and manual compression was performed to achieve hemostasis.
HAIC and TACE were discontinued when disease progression (including vascular invasion or the development of extrahepatic spread) or intolerable AEs occurred or when the patient was eligible for another treatment (surgical resection) or withdrew consent. Additionally, the study treatment was suspended when the following conditions occurred: technical difficulty in repeating the treatment (stenosis or occlusion of the tumor-feeding artery or an artery only supplied by the extrahepatic collateral arteries) or unsuitable characteristics (neutrophil count < 1200/μL, platelet count < 60,000/μL, total bilirubin > 30 mmol/L, or albumin < 3.0 mg/dL). The study treatment was stopped if no recovery occurred after a 30-day delay.
If the study treatment was discontinued, the following treatment was defined as subsequent treatment. The subsequent treatment decisions of both groups would be made according to the same protocol by the same multidisciplinary team, based on the tumor burden, liver function, and the patient’s request. Basically, hepatic resections were performed on patients whose tumor shrank to be resectable. For patients with tumor progression without contraindications to TACE, repeating TACE was recommended. For patients whose residual tumors could not be embolized due to technical problems, radiofrequency ablations were used to destroy residual tumors when it was feasible. Conservative treatments were given to patients with terminal HCC, Child–Pugh C liver function, or Eastern Cooperative Oncology Group (ECOG) score > 2 [32 (link)].