RecruitingDiagnostic testTissue Analysis After Tumor Ablation for Liver Metastases Leading to Immediate RetreatmentThis study will see whether collecting and analyzing needle biopsy samples from cancer liver metastases after a tumor ablation procedure will be able to identify cancer cells that are still alive. The results of these biopsies could help determine the next treatment for your cancer, but the biopsies could cause side effects.