Percutaneous Tumor Ablation Vs Partial Nephrectomy for Small Renal Mass: the Impact of Histologic Variant and Tumor Size

Inclusion Criteria: * Radiologic diagnosis (CT chest-abdomen or MRI abdomen with contrast medium) of renal neoplasm * Renal neoplasm of clinical stage T1a (≤4 cm) N0M0 * Age \>18 years * Informed consent * Absence of other neoplasm Exclusion Criteria: * Patients refuse partial nephrectomy and/or percutaneous renal CA and are candidates for active surveillance * Patients who are candidates for radical nephrectomy