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We report 2 cases of pelvioureteral junction obstruction of the lower moiety in incomplete duplex systems. The connecting segments distal to the pelvioureteral junction were short, which created some technical problems. The diagnostic approach and the different surgical techniques are discussed. When confronted with a pelvioureteral junction obstruction in an incomplete duplex system the proper anatomy should be defined completely preoperatively.
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Ossandon et al. (1981) studied this question.
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