Document Detail

Allantoic cysts and posterior urethral valves: a case report.
MedLine Citation:
PMID:  21157772     Owner:  NLM     Status:  Publisher    
Allantoic cysts are a somewhat rare entity. They are identifiable on antenatal ultrasound exam but are not easily distinguishable from pseudocysts which are often associated with a poor prognosis. Their etiology remains obscure and obstructive uropathies have been proposed to be one of the underlying mechanisms. We report a case in which both allantoic cysts and a patent urachus were detected antenatally and turned out to be associated with posterior urethral valves (PUV). The cysts were first seen in early second trimester, with a full bladder and patent urachus. They disappeared by the 29th week. During the subsequent ultrasonographic controls, the bladder was emptying regularly. The kidneys remained normal throughout the pregnancy. We hypothesize that the increased pressure within the urinary tract kept the urachus patent, led to the formation of allantoic cysts and, later, to their perforation. This allowed the fetus to empty his bladder and kept him from the usual complications of PUV. This case emphasizes the importance of detection and characterisation of umbilical cord cysts on antenatal ultasonographic exams. Therefore, the obstructive uropathies may be included in the differential diagnosis. Copyright © 2010 ISUOG. Published by John Wiley & Sons, Ltd.
Michel Bureau; Stéphane Bolduc
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2010-12-14
Journal Detail:
Title:  Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology     Volume:  -     ISSN:  1469-0705     ISO Abbreviation:  -     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-12-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9108340     Medline TA:  Ultrasound Obstet Gynecol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
From the Division of Urology, Centre Hospitalier Universitaire de Québec (CHUQ), Université Laval, Quebec city, Canada.
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