Document Detail

The amniotic sheet: a truly benign condition?
MedLine Citation:
PMID:  16254890     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Amniotic sheets are the result of uterine synechiae that have been encompassed by the expanding chorion and amnion. Radiologically they are seen as 'shelves' in the amniotic cavity. The benign nature of such amniotic sheets has been documented in many case series in the literature. The objective of this study was to determine the characteristics (if any) of amniotic sheets that predict fetal outcome. METHODS: Between January 2001 and December 2002, detailed scans were performed in 30 476 singleton pregnancies at 18-32 weeks' gestation. Of these, 44 cases of amniotic sheets were detected. The characteristics studied were site of amniotic sheet and whether the amniotic sheet was complete (i.e. no free edge seen on ultrasound) or incomplete (i.e. presence of free edge seen on ultrasound). The primary fetal outcome studied was stillbirth. RESULTS: The incidence of amniotic sheets was 0.14%. Two were complete and 42 were incomplete. Of the 38 cases with known outcomes there were two intrauterine deaths. There was no association between fetal outcome and the uterine location of the amniotic sheet (i.e. upper two-thirds vs. lower third, P = 0.5). There was, however, an association between the completeness of the amniotic sheets and intrauterine death (P = 0.002). Both instances of intrauterine death occurred in the two cases with complete amniotic sheets. Postmortem examination suggested that cord accidents were the cause of intrauterine death in both cases. CONCLUSIONS: This study supports the view that incomplete amniotic sheets are benign. It also suggests for the first time that complete amniotic sheets may be associated with intrauterine death.
K B L Tan; T Y T Tan; J V K Tan; Y L Yan; G S H Yeo
Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  Ultrasound in obstetrics & gynecology : the official journal of the International Society of Ultrasound in Obstetrics and Gynecology     Volume:  26     ISSN:  0960-7692     ISO Abbreviation:  Ultrasound Obstet Gynecol     Publication Date:  2005 Nov 
Date Detail:
Created Date:  2005-11-02     Completed Date:  2006-02-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9108340     Medline TA:  Ultrasound Obstet Gynecol     Country:  England    
Other Details:
Languages:  eng     Pagination:  639-43     Citation Subset:  IM    
Copyright Information:
(c) 2005 ISUOG
Division of Obstetrics and Gynaecology, KK Women's and Children's Hospital, Singapore.
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MeSH Terms
Amnion / abnormalities*,  ultrasonography
Amniotic Band Syndrome / etiology,  ultrasonography
Infant, Newborn
Pregnancy Complications / etiology*,  ultrasonography
Pregnancy Outcome
Retrospective Studies
Ultrasonography, Prenatal / methods

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