Immunotherapy Combined With Y-90 and SBRT for Colorectal Liver Metastases

Durvalumab will be dosed at 1500 mg fixed dosing every 4 weeks and continued at this interval until progression or dose-limiting toxicity.

Durvalumab will be dosed at 1500 mg fixed dosing every 4 weeks and continued at this interval until progression or dose-limiting toxicity. Tremelimumab will be dosed at 75 mg every 4 weeks (same day as durvalumab infusion) for a maximum of 4 doses.

Yttrium-90 microsphere therapy consists of resin beads loaded with Yttrium, a pure beta emitter with a 64.2 hour half-life. Radioembolization will be performed as standard of care therapy per current NCCN guidelines.

High-dose hypofractionated conformal external beam radiation therapy that is considered a standard of care. SBRT will also be considered for metastases that are persistent and/or progressive after Y-90 based on MR imaging and pathology from tissue biopsies.