[Imaging of ureteral and pelvic diverticuli. Apropos of 49 cases].

A review of 49 cases of rare ureteral and pelvic diverticula enables certain clinical and radiologic conclusions to be drawn. Lesions were bifid ureters with blind branches (20 cases), single (8 cases) or multiple (10 cases) diverticula of ureter and pelvic diverticula (11 cases). As previously reported, ureteral diverticula produced few clinical signs whereas these were marked in pyelic lesions. Multiple diverticula are particularly difficult to detect, but diagnosis is the rule from radiologic appearances and is generally confirmed by results of therapy. Their pathogenesis is poorly understood, however, mainly due to lack of histologic data, but recent studies by Cochran suggest they are a particular from of ureteritis. The only debatable point is the frequent association of multiple diverticula with bladder tumor, described by Cochran and confirmed by the authors and unlikely to be the result of chance. Further studies are necessary to provide clarification.