Ureteral intussusception by papillary transitional cell carcinoma

A case of ureteral intussusception caused by a low-grade papillary transitional cell carcinoma of the ureter is described. This is the first case of ureteral intussusception resulting from a malignant tumor of the ureter. The patient presented with weight loss and vague pain in the right lower abdominal quadrant. Right ureterovesical junction obstruction was seen in the retrograde pyeloureterogram. Right nephroureterectomy including a cuff of adjacent bladder wall was performed.