PMC3350215_01
Serial contrasted CT scan of the abdomen demonstrating interval growth of enhancing left renal mass (12, 8, 4 months prior to partial nephrectomy).
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Eleven months earlier, she had a CT abdomen performed as part of a cardiac transplant workup which revealed a 1.5 cm enhancing left upper pole renal mass (Figure 1). By the time the patient developed severe decompensated heart failure necessitating LVAD placement, the mass had grown to 2.7 cm (Figure 1). 
Postoperative CT abdomen demonstrating PTFE bolster on left kidney.
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CT scan of the abdomen revealed a radiodense material over the superolateral aspect of the left kidney (Figure 2).
Confirmation of no retained sponge with series of abdominal plain films.
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This did not reveal ribbon-like radiopaque material which would be consistent with a retained laparotomy sponge (Figure 3).