Percutaneous management of a nephrocutaneous fistula due to a pyelocaliceal diverticular calculus

Nephrocutaneous fistulas arising from stone-containing pyelocaliceal diverticula are rare. We describe 2 patients who were treated by open drainage for perirenal abscesses. Subsequently, both patients presented with a nephrocutaneous fistula from a stone-containing pyelocaliceal diverticulum. These patients were successfully treated by percutaneous nephrostolithotomy with fulguration of the diverticula.