Fig. 1

Enhanced CT findings in the patient. a The transplanted kidney shadow in the right iliac fossa (blue arrow). A slightly low-density shadow in the autologous left kidney, with some protrusion beyond the kidney contour (red arrow). b The transplanted kidney in the right iliac fossa (red arrow), with dilatation of the renal pelvis and some renal calyces which also contained an effusion (blue arrow). c Small rounded, slightly low-density shadows (mass (I)) in the autologous left kidney (red arrow). d Large rounded, slightly low-density shadows (mass (II)) in the autologous left kidney (red arrow)