This is a prospective, single-arm, open-label, multicenter study with 166Ho-TARE in unresectable HCC patients with limited tumor burden and well-preserved liver function and performance status, ineligible for liver transplantation and/or liver resection. Eligibility for liver transplantation and liver resection is determined by the multidisciplinary tumor board. However, patients eligible for liver transplantation can still be included in the setting of bridge to transplant.~The study proposes to use 166Ho-TARE, including both therapeutic 166Ho-microspheres (QuiremSpheres™ Holmium-166 Microspheres) and scout 166Ho-microspheres (QuiremScout™ Holmium-166 Microspheres). All patients providing informed consent and meeting the selection criteria will be further screened using a scout dose of 166Ho-microspheres to evaluate 166Ho-TARE eligibility. Patients not eligible for selective 166Ho-TARE are considered screen failures and will not be considered as enrolled.~The primary endpoint will be assessed by blinded, independent central review, organized by an imaging core laboratory.
166Ho-TARE is a promising modality for the treatment of HCC, given the unique characteristics of holmium, allowing careful patient selection and personalized dosimetry treatment planning. Further clinical evidence is needed to evaluate the safety and efficacy of 166Ho-TARE in the treatment of HCC patients with limited tumor burden, well preserved liver function and performance status and ineligible for liver transplantation and/or liver resection. This study will also provide further evidence on the dose-response relationship of 166Ho-TARE in (early) HCC.