[Cancer of the colon following ureterosigmoidostomy or following bladder enlargement using a colonic graft].

The role of carcinogenic factors following urinary diversion are here studied on the basis of three very different cases. In the first, an adenocarcinoma developed at the site of a ureterocolic anastomosis thirty one years after Coffey's operation for bladder exstrophy. In the second, the tumor had developed, 31 years after uretero-sigmoidostomy, for ureteral trauma.

[Urologic complication of renal transplantation. Importance of the length of the ureter].

The authors report a series of 430 renal transplantations performed over five years. During this period, the surgical technique was modified to ureterovesical anastomosis. The urological complications--fistulae and stenosis--are discussed as a function of the site of the implantation, the position of the kidney, the type of anastomosis and the length of the ureter.

[Urethral stricture: one-stage urethroplasty using a free skin flap].

We report our experience of one-stage free skin graft urethroplasty in 18 patients, most of whom had iatrogenic stricture of the urethral bulb. Our results were similar to those reported in the literature, being satisfactory in about 80% of the cases, and were further improved by adjuvant procedures, such as urethrotomy. We consider that free skin graft urethroplasty is the most reliable method to treat strictures of the urethral bulb after failure of urethrotomy.

[Urethral stricture: single-stage urethroplasty by a free skin flap].

A single-stage procedure involving the use of a free skin flap for the correction of urethral strictures was performed on eighteen patients. In this series, the strictures were mainly located in the region of the bulbar urethra. Good results were obtained in fourteen cases (80 per cent) out of the eighteen, with a two year followup, or less.

[1-step urethroplasty using Devine's technic. Its use in 18 cases of urethral stricture].

A one stage procedure using a free patch graft of skin for correcting of the urethral strictures was executed in 18 patients. In our series the strictures were mainly located in the region of the bulbar urethra. Good results have been obtained in 14 (80%) of 18 cases with a follow up of up to two years.