Benign renal tumors

Abstract

Various types of benign tumors with different origins arise in the kidney. Benign renal parenchymal tumor includes renal cell tumors such as oncocytoma and papillary adenoma, metanephric tumors, nephroblastic tumors, mesenchymal tumors, and mixed epithelial and mesenchymal tumors. Imaging is crucial in the detection of these renal tumors, and plays a key role in the planning of the treatment. Although the differential diagnosis of these benign tumors and renal cell carcinoma (RCC) is often difficult due to the overlap of imaging findings, understanding the characteristic findings of certain tumors assists in the adequate treatment of patients.