***TASK*** the task is to summarize an input biomedical literature in six sentences 
    ***INPUT*** the input is a biomedical literature 
    ***OUTPUT*** the output is the summary of an input biomedical literature in six sentences 
    ***DOCUMENTATION*** 
    ***EXAMPLES*** 
    Input: We carried out a trial to evaluate the complication rate of intravesical ( LP ) versus extravesical ( Lich ) ureteroneocystostomy in recipients of renal transplantation .  Ureteric stenosis was the predominant complication in the LP technique , which was more difficult to correct . Complications by the Lich technique were urinary leaks , which were managed successfully by prolonged bladder drainage . We conclude that the Lich technique is simpler to perform and avoids the complication of ureteric stenosis , and should therefore be the procedure of choice for ureteric implantation in recipients of renal transplants OBJECTIVE To determine whether the change from the Leadbetter-Politano technique to a stented extravesical technique for the vesico-ureteric anastomosis in renal transplantation has altered the incidence of urological complications . PATIENTS AND METHODS Data were retrieved from a prospect i ve computerized data base and by case-note review on 248 consecutive renal transplants performed between January 1990 and June 1996 . The characteristics of the donor . recipient and organ were noted , together with the technique used for the vesicoureteric anastomosis and the occurrence of major and minor urological complications . RESULTS The Leadbetter-Politano technique was used in 140 transplants and the stented extravesical technique in 108 . There were no significant differences in the donor , recipient or organ characteristics between the groups . The stented extravesical technique was associated with a significantly lower rate of major complications ( < 2 % ) and clinical ly significant haematuria than with the Leadbetter-Politano technique . CONCLUSION Changing from the Leadbetter-Politano technique to a stented extravesical technique for the vesico-ureteric anastomosis has been a major factor in reducing the incidence of urological complications in our transplant practice Abstract The incidence of urologic complications was studied in 131 patients with cadaver renal allografts allocated r and omly to undergo either the Politano-Leadbetter or end-to-side ureteroneocystostomy .  Obstruction occurred in 6 per cent of patients with end-to-side versus 0 per cent of those with Politano-Leadbetter reconstructions ( p less than 0.05 ) . Complications of leakage , infection and graft loss were comparable in the 2 groups 
    Output:
    
Based on our results , we conclude that there is evidence in favour of the extravesical ureteroneocystostomy for having a smaller amount of urological complications  in kidney transplantation