Tumefactive Fat Necrosis with Multinucleate Giant Cell Reaction Mimicking Recurrent Renal Cell Carcinoma following Percutaneous Renal Cryoablation

Figure 2

Patient imaging following cryoablation. (a) Contrasted MRI 2 years following cryoablation of left renal mass demonstrating new lesion development described as an ill-defined 2-centimeter focus of soft tissue highly suspicious for disease recurrence. The lesion appears to follow the cryoablation tract path. (b) Contrasted MRI 2-year status-post-partial nephrectomy of left renal lesion with full excision of perinephric fat displaying stable changes of bilateral partial nephrectomy without evidence of local recurrence.

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