[A Case of Ureteral Sciatic Hernia Treated with Ureteral Stent].

An 83-year-old woman who was diagnosed with hydronephrosis on the right side was referred to our hospital. An abdominal computed tomography scan failed to reveal the cause of the hydronephrosis due to artifacts caused by her artificial hip joint. A subsequent magnetic resonance imaging scan revealed a ureteral herniation into the sciatic foramen. Retrograde pyelography demonstrated hydronephrosis and dilated ureter loopsthrough the sciatic foramen, known asa "curlicue sign". A ureteral stent was placed on her right side, and the ureter waslinearized. After the stent wasplaced, the hernia wasrepaired and the hydronephrosiswasres olved. The ureteral stent wasremoved 3 monthslater, and relapse of the ureteral sciatic hernia did not occur, even after 18 months.