fetal lower urinary tract obstruction posterior urethral valve GARD:0007439 ICD10:Q64.2 ICD9:753.8 MONDO:0019640 MedDRA:10036369 NCIT:C99021 Orphanet:93110 PUV Posterior urethral valve (PUV) is the most common anomaly of fetal lower urinary tract obstruction (LUTO)and is characterized by an abnormal congenital obstructing membrane that is located within the posterior urethra associated with significant obstruction of the male bladder restricting normal bladder emptying. Posterior urethral valves SCTID:253900005 UMLS:C0238506 UMLS:CN227669 congenital posterior urethral valves