MR imaging in the evaluation of small (< or =3.0 cm) renal masses.

The use of MR imaging in evaluating renal tumors has expanded beyond the established utility for patients with renal insufficiency and allergy to iodinated contrast. MR imaging is increasingly relied on for the evaluation of small renal lesions. The use of gadolinium chelate contrast agents, high performance MR systems, and optimized techniques is essential. This article details our experience using MR to evaluate small renal tumors and reviews the clinical issues pertinent to the management of these lesions.