Fetus urInary block. The most common cause of a fetus having lower urinary tract blockage would be a "posterior urethral valves". This happens in boys and has a spectrum of presentation and treatments depending on the severity of the blockage and there may be issues with the bladder and kidneys because of the blockage. Because this issue can harm the fetus' lungs, your OB and. Pediatric urologist should be involved.
Many things. Anything that blocks the bladder outlet, preventing urine from passing through to the urachus, an organ found only in the fetus will cause a buildup of pressure which can ultimately damage the kidneys. The urachus ultimately closes and undergoes degeneration after birth. Surgeons may have the ability to operate in the womb on the fetus to correct some of these conditions.
The following. Posterior urethral valves form a cusp-like obstruction just below the bladder neck. Anterior urethral valves are due to a urethral out-pouching, this fills with urine and distal end becomes a "flap valve" which obstructs. Urethral atresia or congenital stricture. Ureterocele, ectopic or orthotopic can block bladder neck or prolapse causing obstruction. Vaginal atresia + urogenital sinus.
Several. Ureteroplevic junction obstruction, ureterovesical obstruction, ureterocele, ectopic ureter, posterior urethral valves, cloacal deformity, pelvic tumors such as sacrococcygeal teratoma - among others.
Not common terms. You may mean urinary tract INFECTION. At any rate, upper would mean kidneys and the tubes that collect urine from them to deliver urine to the bladder, and lower would mean bladder and the tube that carries urine to the outside. Generally infections in the lower tract are less serious than the upper tract, but one can lead to the other if not treated.