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Undiversion in patients with meningomyelocele.

Since 1981, 12 patients with neurogenic bladder due to meningomyelocele who had had previous ileal conduit urinary diversions underwent assessment for undiversion. Two important criteria for undiversion were motivation and a reconstructable bladder. Four patients either did not fulfil these criteria or refused surgery. Eight patients (six females and two males) underwent undiversions. Uretero-ureteral anastomosis was achieved in 13 ureters and ureteroneocystostomy in 2; transureteroureterostomy was necessary in 1 ureter. Augmentation cystoplasty and vesicourethropexy were important in establishing continence postoperatively; these procedures were not performed in two patients whose undiversion failed early in the series. The evolution of an investigation protocol, surgical technique and final approach to this complex problem are discussed.