Use of an Over-the-Scope Clip for Closure of an Iatrogenic Nephrocolic Fistula Resulting From Cryoablative Therapy for Renal Cell Cancer of a Transplanted Renal Graft.

Although uncommon, cryoablation of tumors can result in collateral damage to adjacent organs resulting in difficult-to-treat perforation and fistulization. Full-thickness closure of defects has been described with the use of over-the-scope clips. We describe the case of a 56-year-old woman who underwent cryoablation of renal cell carcinoma of her transplanted kidney that was complicated by cryoinjury to her sigmoid colon with subsequent nephrocolic fistula and abscess formation resistant to conservative treatment. We report a case of successful abscess drainage and use of over-the-scope clip for closure of an iatrogenic renal graft nephrocolic fistula.