Key clinical point: Radiation segmentectomy shows high efficacy with a low high-grade adverse event rate in patients with unresectable very early- to early-stage hepatocellular carcinoma (HCC) at unfavorable locations for ablation.
Major finding: Initial target lesion complete and partial response rates were 83% and 17%, respectively, whereas the initial objective and sustained complete response rates were 100% and 90%, respectively. Grade 3 leukopenia and thrombocytopenia were observed in 14% and 7% of patients, respectively, whereas no grade 4 events were observed.
Study details: Findings are from a prospective, single-center study, RASER, that included 29 adult patients with unresectable, solitary, very early- to early-stage HCC (diameter ≤ 3 cm) at a location unsuitable for ablation and no metastasis or macrovascular invasion.
Disclosures: The study was sponsored by Boston Scientific. Some authors declared being on the medical advisory board of or receiving grant support or consulting fees from various sources, including Boston Scientific.
Source: Kim E et al. Radiation segmentectomy for curative intent of unresectable very early to early stage hepatocellular carcinoma (RASER): a single-centre, single-arm study. Lancet Gastroenterol Hepatol. 2022 (May 23). Doi: 10.1016/S2468-1253(22)00091-7