Comparison of Ultrasound and Magnetic Resonance Urography for Evaluation of Contralateral Kidney in Patients With Multicystic Dysplastic Kidney Disease

Purpose: The contralateral kidney is abnormal in up to 25% of patients with multicystic dysplastic kidney. Traditionally, anatomical and functional evaluation of the contralateral kidney has been performed with ultrasound and dimercapto-succinic acid renal scintigraphy, as indicated. Recently magnetic resonance urography has been used to evaluate renal anatomy and function in other urological abnormalities. We compared the results of magnetic resonance urography and ultrasound for evaluating the contralateral kidney in patients with multicystic dysplastic kidney and we describe the range of findings detected.Materials and Methods: Patients with multicystic dysplastic kidney who underwent magnetic resonance urography were identified. Anatomical findings on magnetic resonance urography were analyzed and compared to those on renal ultrasound. Additional functional information derived from magnetic resonance urography was also recorded.Results: We retrospectively identified 58 patients with a unilateral multi...