A new operative technique - Extra renal ureterocalycostomy for correction of PUJ obstruction in a horseshoe kidney

The authors describe a novel operative technique in a child with PUJ obstruction in a horseshoe kidney, where a pyeloplasty was clinically indicated but unsafe because of insufficient length of ureter and predicted technical difficulty in transposing large renal vessels coursing to the renal hilum. During the operation, there was a favourably positioned extra renal lower pole calyceal infundibulum identified, of similar dimensions to the spatulated ureter and this was chosen for an end to side tension free anastomosis. As far as the authors are aware this technique of extra renal ureterocalycostomy has not been described before.