Uretero-pelvic stenosis.

In a prospective series of 66 patients with uretero-pelvic stenosis ("genuine hydronephrosis") the clinical data and the results of treatment were registered. We found an estimated incidence per year of 5:100,000 inhabitants. In the age group under 10 years there was a striking majority of boys. Routine antimicrobial prophylaxis was not given; only one patient had clinical urinary tract infection postoperatively, but bacteriuria in the nephrostomy catheter was frequent. Follow-up 12 months after dismembered pyeloplasty with postoperative nephrostomy showed 85% of the patients to be cured, i.e. with no symptoms and with normal drainage from the renal pelvis. In 5% of the cases (3 patients) the result was unsatisfactory. The technique can be recommended in the treatment of ureteropelvic stenosis.