NCT06773845

Building Evidence for Ablative Internal Radiation Therapy in Localized HCC Beyond the Up-To-7 Criteria

Building Evidence for Ablative Internal Radiation Therapy Using Yttrium-90 Glass Microspheres in Localized Hepatocellular Carcinoma Beyond the Up-To-7 Criteria

• Status: Recruiting
• Phase: Phase 2
• Study type: Interventional
• Enrollment: 100 (estimated)
• Sponsor: Seoul National University Hospital · Academic / Other
• Sex: All
• Age: 19 Years
• Healthy volunteers: Not accepted

Summary

At four major centers in Korea, patients with hepatocellular carcinoma (HCC) that exceed the up-to-7 criteria yet remain locally confined will undergo ablative radioembolization using Yttrium-90 glass microspheres, guided by a standardized dosimetry method. Their treatment response, survival outcomes, and adverse events will be monitored for two years following the procedure.

Detailed description

This prospective, multi-center, open-label, single-arm, phase II clinical trial aims to evaluate the efficacy and safety of ablative radioembolization in patients with hepatocellular carcinoma (HCC) that exceeds the up-to-seven (UT7) criteria but is confined to up to five geographically adjacent Couinaud segments. The primary endpoint is the objective response rate, assessed according to the modified Response Evaluation Criteria in Solid Tumors (mRECIST). All patients will receive ablative radioembolization using Yttrium-90 glass microspheres with a personalized dosimetry approach targeting a tumor dose of 700 Gy (±50%). In cases of high tumor burden, a second radioembolization within 180 days of the initial procedure will be permitted at the operators' discretion, provided the cumulative lung dose remains below 50 Gy. Follow-up evaluations, including laboratory tests and dynamic imaging, will be performed at 4 weeks post-treatment and every 3 months thereafter for a total of 2 years. Efficacy data-including tumor response and survival-will be collected, with tumor responses evaluated by both site investigators and a blinded independent central review. Adverse events will be documented and graded according to the Common Terminology Criteria for Adverse Events v5.0. In addition, the incidence of radioembolization-induced liver disease and radiation pneumonitis will be monitored for 6 months following the procedure.

Conditions

• Hepatocellular Carcinoma (HCC)
• Radioembolization

Interventions

Type	Name	Description
DEVICE	TheraSphere	The multicompartment MIRD model (a.k.a. partition model) based on diagnostic CT/MRI and 99mTc-MAA SPECT-CT will be used to plan a targeted dose of 700 Gy (± 50%) to the tumor. Given the high tumor burden, a scheduled second radioembolization within 120 days from the initial treatment will be permitted at the discretion of the operators provided the cumulative lung dose remains below 50 Gy. A scheduled second radioembolization may be considered when the largest tumor diameter exceeds 8 cm, or the estimated lung dose reaches 30 Gy while the tumor absorbed dose remains below the target dose of 700 Gy. The radioactive microsphere delivery device used will be glass-based (TheraSphere; Boston Scientific, MA, USA), in which Y90 is an integral constituent of the biocompatible glass matrix. Dosimetry planning will be made by personalized dosimetry software (Simplicit90y; Boston Scientific).

Timeline

• Start date: 2025-03-11
• Primary completion: 2027-12-31
• Completion: 2029-12-31
• First posted: 2025-01-14
• Last updated: 2025-06-17

Locations

4 sites across 1 country: South Korea