Absent urethra and congenital atresia

Absence of urethra and urethral atresia (urethral agenesis and atresia) are rare. Urethral atresia can be complete, partial, or membranous. Those with complete urethral atresia have a cable-like urethra; those with partial occlusion usually occur at the head of the penis or the urethra of the penis; those with membranous atresia usually occur at the outer urethra or posterior urethra of the penis head, and most of them occur at the urethra Outer mouth.