Introduction: Nephrocolic fistula is a pathological connection between the kidney and colon. Percutaneous tumour ablation therapy is a rare cause of iatrogenic nephrocolic fistulain in the literature.
Case Presentation: Interventional radiologist should be careful especially in patients with repeated ablation. Granulation tissue may lead to unexpected results secondary to tissue fragility and impedance changes.
Conclusion: In addition, we should keep in mind that there is decreasing hydrodissection benefit in cases with previous ablation. As far as we know, this is the first case report of an iatrogenic ephrocolic fistula after microwave ablation for recurrence renal cell carcinoma.