Congenital anterior urethral valve

Congenital anterior urethral valve can be associated with or without diverticulum. The valve is located on the ventral side of the urethra at the junction of the penis and scrotum. It does not hinder the insertion of the urethra, but hinders the discharge of urine, leading to the expansion of the proximal urethra. When the obstruction is severe, it causes the same damage as the posterior urethral valve. A small open diverticulum with a neck usually does not cause obstruction, but it can be complicated by stones with symptoms. When a wide-mouth diverticulum is filled with urine, its distal lip acts as a valve that obstructs the flow of urine. The congenital diverticulum may be caused by a local corpus cavernosum deficiency.