Posterior Urethral Valves (PUVs)
→ A/k/a congenital obstructing posterior urethral membranes (COPUM).
→ It is an ultrasonographic sign seen in boys with Posterior Urethral valves.
→ Refers to the appearance of proximal Urethra and an associated thick-walled distended bladder which on USG may resemble a keyhole.
→ Clinical features- Oligohydramnios, UTI