Urinary tract obstruction is a urologic disease consisting of a decrease in the free passage of urine through one or both ureters and/or the urethra.

Complete obstruction of the urinary tract requires prompt treatment for renal preservation.

[1] Any sign of infection, such as fever and chills, in the context of obstruction to urine flow constitutes a urologic emergency.

Pulmonary hypoplasia is by far the main cause of death in the early neonatal period for children with congenital lower urinary tract obstruction.

[3] Fetal surgery of congenital lower urinary tract obstruction seems to improve survival, according to a randomized yet small study.