Urology and Nephrology

, Volume 1, Issue 4, pp 323–343 | Cite as

Bladder diverticula

  • S. Gil Vernet


Bladder diverticula are of two different types: 1. Those due to abnormal embryonal evolution giving rise to abnormalities, deviations or arrest in development. To this group belong the well-known diverticula of the urachus. But apart from these there exist other, less recognized diverticula probably due to evagination of the embryonal epithelium of the bladder: they are the supratrigonal diverticula, those located in the centre of the vesical dome, and some varieties of paraureteral diverticula. A diverticulum is described into which the ureter ends; probably because of excessive ascension of the embryonal ureter. 2. Those which are not due to abnormalities of development or so-called acquired diverticula. There are two varieties in this group; the foetal diverticulum arising in the second half of pregnancy and diverticula formed after birth, which make up the majority. In the genesis of acquired diverticula, both predisposing causes (weak spots of the vesical wall) and determinant causes (any pathology causing prostatism and increase of the intravesical pressure) should be considered. This mechanism of formation is evident in the acquired diverticula after birth, and also in the foetal diverticula, since the urine contained in the bladder is evacuated to the amniotic cavity through actual micturition. It is possible that in this stage there already exist obstacles to urination. It is, therefore, proper to say that the same causes produce the same effects in all stages of life.


Public Health Embryonal Evolution Weak Spot Intravesical Pressure Amniotic Cavity 
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Copyright information

© Publishing House of the Hungarian Academy of Sciences 1969

Authors and Affiliations

  • S. Gil Vernet
    • 1
  1. 1.Department of UrologyUniversity Medical SchoolBarcelonaSpain

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