 |
|
 |
|
|
|
|
|
| Primary Obstructive Megaureter, Discovered as a Large Abdominal Cyst by Prenatal Ultrasonography : A Case Report | |
| Tetsuro Kodaka1，2）, Takako Nishina1）, Takatsugu Murakoshi1） | |
| Department of Surgery, Tokyo Metropolitan Hachioji Children’s Hospital1） Department of Pediatric Surgery, Faculty of Medicine, University of Tokyo2） |
|
|
|
| Abstract | |
| We report a case of primary obstructive megaureter without hydronephrosis, which was discovered as an abdominal cyst by prenatal ultrasonography. A large abdominal cyst was detected by prenatal ultrasonography at 21 weeks and 4 days of gestation. It grew rapidly from 37 weeks. Caesarean section was performed at 38 weeks and 3 days when a boy was born. His abdomen was too distended for him to breathe freely. Abdominal CT showed a large cyst occupying almost all the abdominal cavity. Since bilateral kidneys seemed normal, we considered the cyst to be mesenteric or omental origin and performed laparotomy. At operation, we found it originated from the right urinary system. After the drainage operation, we discussed why he had no hydronephrosis despite his megaureter. We supposed his right urinary system should be completely duplicate, and performed the second operation. But the operative findings showed his right urinary system was composed of double renal pelvises and a single megaureter. Some cases of primary obstructive megaureters are reported to be discovered as abdominal cysts. We should take into consideration that many large abdominal cysts of the male are derived from disorders of the urinary system. |
|
| Keywords：Megaureter, Abdominal cyst, Prenatal diagnosis, Ultrasonography, Hydronephrosis | |
|
|