Exophytic Renal Masses: Angular Interface with Renal Parenchyma for Distinguishing Benign from Malignant Lesions at MR Imaging

The presence of an angular interface with the renal parenchyma at single-shot fast SE T2-weighted MR imaging is a strong predictor of benignity in an exophytic renal mass 2 cm or greater in diameter with high specificity and diagnostic accuracy.