Magnetic Resonance Imaging-guided Thermal Radiofrequencey Ablation of Primary Renal Cell Carcinoma, Hepatic Metastasis, and Other Sites of Solid Organ Tumor and Metastases

RATIONALE: Radiofrequency ablation uses high-frequency electric current to heat and kill tumor cells. Magnetic resonance imaging-guided radiofrequency ablation may an effective treatment for primary kidney cancer, liver metastases, or other solid tumors. PURPOSE: Phase II trial to study the effectiveness of magnetic-resonance-guided radiofrequency ablation in treating patients who have primary kidney cancer, liver metastases, or other solid tumors.