PARA-URETERAL DIVERTICULA - ASSOCIATED RENAL MORPHOLOGY AND EMBRYOGENESIS

  • 1 January 1977
    • journal article
    • research article
    • Vol. 14  (5) , 381-385
Abstract
Paraureteric diverticula, the associated ureteric orifices and the accompanying kidneys [obtained at postmortem in neonates or infants] were studied. The kidney was more abnormal as the ureteric orifice position lay more laterally and into the diverticulum. The fascial arrangements of the terminal ureter and the related diverticulum were examined. When the ureter opened totally within the diverticulum, both structures showed a single investment of fascia, suggesting a common embryologic origin of the 2 structures. When the ureter opened either separately into the bladder or on the verge of the diverticulum, the ureter and the adjacent diverticulum each had separate fascial investment, suggesting a different etiology for the formation of this type of diverticulum. A total of 25 single-system specimens were employed. In the series there were an additional 3 duplex systems associated with paraureteric diverticula in which the kidney morphology followed the above pattern but the fascial arrangements were different. The renal morphology was governed by the position of the ureteric orifice in the diverticulum and the term vesical hiatal diverticula is suggested to denote those diverticula occurring in the vicinity of the ureteric orifice. The diverticulum which engulfs the ureteric orifice should be called paraureteral, and those with separate orifices in the bladder should be termed periureteral to differentiate the embryologic from the pulsion etiologies.

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