- Patients who have received prior chemotherapy, chemoembolization, immunotherapy, or radiotherapy for their HCC. Prior surgical resection, intratumoral ethanol injection, hormonal therapy, cryosurgery, radiofrequency ablation, selective internal radiation or embolization, is permitted ONLY if > 6 weeks has passed since therapy and there is an indicator lesion (> 1 x 1 cm) outside the area of prior treatment (recurrence at the margin or resection is allowed)