Chorioamniotic separation after second-trimester genetic amniocentesis: importance and frequency.

Levine, Deborah; Callen, P W; Pender, Siobhan; McArdle, Colin R.; Messina, Lauren C.; Shekhar, Abhinaya; Wong, G P

doi:10.1148/radiology.209.1.9769829

Cited by 36 publications

(50 citation statements)

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“…Of the 47 reported cases, 29 patients (62%) had amniocentesis; 2 patients (4%) underwent amniodrainage for polyhydramnios [12,14]; 5 patients (11%) had in utero fetal surgery by hysterotomy for diaphragmatic hernia [10]; 1 patient (2%) had chorion villus sampling at 9 weeks of gestation [11], and, finally, 10 cases of CMS (21%) occurred spontaneously, of whom 1 had polyhydramnios associated with encephalocele [12].…”

Section: Resultsmentioning

confidence: 99%

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Complete Chorioamniotic Membrane Separation

et al. 2003

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We present a patient who developed complete chorioamniotic membrane separation (CMS) in two consecutive pregnancies. The first pregnancy ended with an intrauterine fetal death at 25 weeks of gestation. The entire separated amniotic sac had twisted around the umbilical cord. In the subsequent pregnancy, a complete CMS was diagnosed at 34 weeks of gestation. In both pregnancies, the patient underwent an early 2nd-trimester genetic amniocentesis. A review of the literature shows that extensive CMS is associated with miscarriage, in utero fetal death, umbilical cord complications, and preterm delivery. Most reported cases occurred after invasive intrauterine procedures.

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Section: Resultsmentioning

confidence: 99%

“…Two IUFD cases were related to an amniotic band around the cord [10], 1 case was associated with thrombosis of a segment of the cord near the placenta [11], and for the remaining 3 cases, the cause of IUFD was not specified [6,11]. In 6 cases, the pregnancy resulted in a midtrimester miscarriage [6,8,9,11,13,14].…”

Section: Resultsmentioning

confidence: 99%

Complete Chorioamniotic Membrane Separation

et al. 2003

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“…The membranes may be partially separated at one site (partial or focal), they may be completely separated to the insertion of the amnion on the umbilical cord (complete or circumferential). In mild cases, it usually remains subclinical and even unrecognizable on subsequent sonographic examinations (6). However, in cases of severe separation, it is associated with the most significant morbidity and mortality leading to amniotic band syndrome presenting with ligation of umbilical cord and impairment of umbilical blood flow (6,7).…”

Section: Discussionmentioning

confidence: 99%

A Case of Complete Chorioamniotic Membrane Separation after Amniocentesis Resulted with a Healthy Term Delivery

Ensarı

Aldemir

Yırcı

et al. 2016

Gynecol Obstet Reprod Med

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Separation between amniotic and chorionic membranes is a normal sonographic finding before 14th weeks of gestation. As pregnancy progresses, these membranes fuse and chorionic cavity becomes obliterated. Chorioamniotic membrane separation may occur spontaneously or as a complication of invasive intrauterine procedures. Following invasive fetal intervention, resulting in a condition referred to as chorioamniotic membrane separation (CMS) and it is reported to be associated with adverse perinatal fetal outcomes. Here we present a case of CMS that had occurred after a second trimester amniocentesis and resulted with the delivery of a term healthy baby. Complete post-interventional CMS may complicate pregnancy progression. Although there are no established guidelines to follow, close followup may CMS can be managed to be a morbid, rather than mortal condition.

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“…Partial non-fused membranes were included in other studies 2 -4 . The separation required between the two membranes to define CAS has been reported variously as at least 10 mm 5,6 , 3 mm 2,3 or 1 mm 4 . The highest rate of aneuploidy was observed in studies which included only major separation.…”

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confidence: 99%

“…Isolated CAS was associated more often with an aneuploidy when the separation between the membranes was large (> 10 mm) and complete. Some studies included CAS detected after amniocentesis 1,4 while others included only spontaneous cases 2,3,5 . Levine et al demonstrated that CAS occurring following amniocentesis was often a limited form with no specific consequences on the pregnancy 4 .…”

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confidence: 99%