Urology

We call urinary tract the structure that communicates the kidney with the bladder (upper urinary tract) and this one with outside through the urethra bringing urine from the kidney where it forms to the bladder where it is stocked in order to be expelled via miction. The urinary tract has three parts; the calices and the renal pelvis that are located near the kidney, the ureter that is the duct that conducts urine from the kidney to the bladder and the urethra that communicates the bladder with the outside as we have mentioned before. In any of these tracts, there may be a stricture of the duct during its development or stenosis.

This is a congenital malformation in the development of the piece of the urinary duct that links the kidney to the bladder (ureter) at the inlet of it in the vesical wall (intra-wall piece). It is caused by an alteration that affects the ureteral calibre or its muscle that gives rise to the dilatation of this part of the duct that shows up as a pseudocystic formation where urine remains stagnant.