Conservative plastic surgery of the kidney pelvis and the ureters has scarcely received the attention it merits when we consider that Kroiss,1 in 1908, in a very comprehensive paper on the subject, was able to collect reports of only 102 cases, and Weinberg,2 in 1911, added reports of but forty-nine operations to the literature on the subject in his exhaustive article. The limited scope of the present study does not permit more than a hasty review of the seventy or more cases I have been able to gather since June, 1911, exclusive of my own unreported cases.
Weinberg's paper includes several personal observations, notably three ureteropyeloneostomies from his Heidelberg clinic. A subsequent cystoscopy in two of the cases showed that the ureter was definitely obliterated in one case and probably so in the other. Strange to say, the latter patient experienced no discomfort whatever from the condition, so