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1 Department of Radiology, St. Luke’s Hospital Center, College of Physicians and Surgeons, Columbia University, New York,
New York.
2 Department of Radiology, New York Hospital—Cornell Medical Center, New York, New York.
A common variation in the urinary tract is duplication of the ureter. Pathologic complications are frequent.
Three examples of an unusual form of this lesion, in which the duplicated ureter drains a small, dysplastic, hydronephrotic cap of tissue at the very tip of the upper pole, are presented.
The angiographic findings may be misleading, unless one is aware of the characteristic appearance. Once suspicion is aroused, review of the intravenous pyelogram, retrograde pyelogram and cystoscopic findings, may help in identification of the ectopic system and help save the major portion of a well functioning kidney.
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