Pelvic and calyceal dilatation is associated with obstruction in over two-thirds of cases. A ureteral stent is present. CDI readily confirms that this is a vessel. Antegrade pyelogram depicting distal ureteric stricture. The immediate treatment of choice for obstructive hydronephrosis is decompression by percutaneous nephrostomy.
Longitudinal sonogram demonstrates transplant hydronephrosis and a lower pole stone.
The upper stricture was not judged suitable for balloon dilatation due to its length. Surgical reimplantation was required.