"Pseudoureterocoeles are acquired dilatations of the submucosal portion of the distal ureter that mimic simple ureteroceles. The appearance of the radiolucent wall surrounding the dilated distal ureteral segment (cobra head sign) is an important differentiating point."
"The distinction is important, since most pseudoureterocoeles were related to malignancy involving the bladder."
"In a pseudoureterocoele:"
"the lucency or halo is thicker than that of a uterocele and is poorly defined; in cases of tumours, it may be irregular and may show a filling defect within the ureterocele"