* Department of Gynecology, FelixGuyonHospital, 97400 Saint- Denis, Reunion Islands, France; tel.: 0262 90 55 22; fax: 0262 90 77 30;
** Department of Neonatology, Hospital Felix Guyon, 97400 Saint-Denis, Reunion Islands, France.
A 30 year-old woman scanned ate 19, 23, 28, 31, and 33 weeks of gestation. At 19th week we discovered a distended thick-walled bladder (images 1A, 1B, 1C, 1D). The amount of amniotic fluid was normal. There was no evidence of pyelectasis or urethral dilatation at 23rd week (images 3A, 3B). At 31st week the pyelectasis appeared with slight progression during the rest of the pregnancy. We assumed the diagnosis of posterior urethral valves.
The baby was delivered at 37th week of gestation (3000 g). Postnatally the diagnosis of posterior urethral valves was confirmed and repaired. The postoperative course was normal.
Images 1A, 1B: 2D ultrasonography; 23rd week of gestation - transverse planes showing dilated, thick-walled urinary bladder.