Transverse T1-weighted (A), T2-weighted (B) and Gadolinium (Gd) -enhanced T1-weighted (C) images are presented. Left kidney has cystic mass lesion at upper pole, which is composed of thinned parenchyma and water signal component. The abnormal renal parenchyma is demonstrated with low signal intensity on both T1 and T2-weighted images. A small-sized parenchymal nodule (arrow) is also depicted isointense and hypointense on T1 and T2-weighted images, respectively, when compared to the normal renal parenchyma. The abnormal parenchyma is heterogeneously enhanced and the nodule is not enhancing after Gd administration.