A type of obstructive uropathy (urine is blocked from flowing out of the kidney.)
Found in male children; it is an obstruction in the urethra which slows the free flow of urine.
a congenital obstruction of the urethra in boys due to the presence of abnormal folds of tissue within the urethra.
an abnormality of the urethra where the urethral valves, (small leaflets of tissue) have a narrow, slit-like opening that partially impedes urine outflow. Reverse flow occurs and can affect all of the urinary tract organs including the urethra, bladder, ureters, and kidneys.
Posterior urethral valves are an obstructive congenital defect of the male urethra.