Q64: Other congenital malformations of urinary system

Q64.3: Other atresia and stenosis of urethra and bladder neck

The urethra channels the urine outward from the bladder. While developing in the womb, many different types of tissue develop in the body. The organs and body parts develop out of the various types of tissue. If tissue does not develop properly in the womb, defects can result.

Due to a defect, there is a narrowing or a closure in the urethra area. A narrowing can restrict the flow of urine in the urethra. If there is a closure, no urine can flow away.

If urine is not able to flow away properly, it can back up. The urinary tract can then become enlarged. The urinary organs can also become more susceptible to pathogens. Restricted urine drainage can cause permanent damage to the urinary organs.