Defining radiographic treatment success after percutaneous renal ablation is challenging due to variable ablation zone imaging findings over time.
The present report describes two cases of progressively more evident enhancing soft-tissue nodules in the perinephric fat more than 2 years after cryoablation. Despite features concerning for tumor recurrence on computed tomography and magnetic resonance imaging, biopsies revealed fat necrosis in both cases. Renal ablation zone soft-tissue nodules can appear long after ablation, enhance with contrast medium, mimic applicator tract or ablation zone tumor seeding, and may require biopsy for confirmation of benignity.
Written by:
Durack JC, Richioud B, Lyon J, Solomon SB. Are you the author?
Department of Radiology, Memorial Sloan-Kettering Cancer Center, 1275 York Ave., New York, NY 10065; Department of Radiology, Centre Léon Bérard, Lyon, France; San Diego Imaging, Sharp Memorial Hospital, San Diego, California.
Reference: J Vasc Interv Radiol. 2014 Jan;25(1):133-7.
doi: 10.1016/j.jvir.2013.07.006
PubMed Abstract
PMID: 24365507
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