Fig. 1.

Images A–D (CT urogram): A) Axial slice showing native atrophic kidneys (red arrows) in arterial phase. B) Axial slice during arterial phase of CT showing 61 mm × 53 mm mass in the mid-anterior renal transplant with distended calyces and multifocal high density material within the collecting system (blue arrow), concerning for Transition Cell Carcinoma (TCC). C) Coronal slice of CT in arterial phase showing renal transplant lesion and lymph node (blue arrows). D) Sagittal slice of CT in arterial phase showing renal transplant lesion (blue arrow).