Failure of getting intracranial translucency image in posterior fossa in the examination of singleton pregnancies at 11–13 weeks of gestation: reasons and outcomes

Aydın, Derya; Yayla, Murat

doi:10.2399/prn.19.0271004

Cited by 1 publication

(5 citation statements)

References 27 publications

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“…In the current study, BS, IT, CM, and BSOB measurements of the control group increase with advancing gestational week and were found to be compatible with the measurements obtained in similar studies. 6,14,18,19,21 The BS/BSOB ratio obtained increases with advancing pregnancy week, and this result contradicts with the findings presented in the current literature where BS/BSOB ratio decreases with advancing pregnancy week. 6,14,21 Although the measurement method is the same, the differences in the population of the study and in the number of patients included in the study may have caused this result statistically.…”

Section: Discussioncontrasting

confidence: 86%

“…Therefore, sufficient data could not be obtained to compare with similar studies in the literature in terms of chromosomal anomalies. In a few studies, postnatal outcome was evaluated in fetuses with enlarged 4 th ventricle, 14,23,25 and negative fetal outcome was found to be 84% in the study by Sivri Aydın D, Yayla M 19 . In our study, 3 out of 6 cases (50%) with isolated enlarged 4 th ventricle, adverse pregnancy outcomes were observed as well.…”

Section: Discussionsupporting

confidence: 59%

“…There are several studies in the literature investigating the relationship of abnormal fetal posterior fossa appearance with chromosomal anomaly between 11 and 14 gestational weeks 14,18–20,22,24 . In the current study, since invasive intervention was not offered to patients with isolated enlarged 4 th ventricle, the karyotype results of 6 cases (27.2%) could not be determined.…”

Section: Discussionmentioning

confidence: 82%

“…Volpe et al stated that the patients in their study were directed to their hospital from different centers and emphasized that the measurements obtained to detect posterior fossa anomaly could not be used to evaluate sensitivity 14 . In a few similar studies, sensitivity and specificity values or detection rates have been given to detect posterior fossa anomaly in fetuses with abnormal cranial measurements 18,19,23 . In our study, differently than in other studies in the literature, regression analysis was performed by determining the sensitivity, specificity, PPV and NPV and ROC curves were created for BSOB, BS/BSOB ratio.…”

Section: Discussionmentioning

confidence: 95%

“…In the 11–14 weeks ultrasonography, the transition from the NT measurement to the IT in the use of the early detection of open spina bifida was first described by Chaoui et al 16 Beginning to evaluate the fetal posterior fossa to detect open spina bifida enabled the early detection of other possible cranial anomalies of the posterior fossa 17 . In the first trimester, the lack of visualization of the choroid plexus of the 4 th ventricle was interpreted as a marker that could be a predictor for posterior fossa anomaly and chromosomal anomaly 18–20 . Fong et al studied BS and BSOB measurements by observing the presence or absence of IT 21 .…”

Section: Discussionmentioning

confidence: 99%

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The importance of first trimester screening of cranial posterior fossa in predicting posterior fossa malformations which may be identified in the following weeks of gestation

Özdemir

Demirci

Ayvaci

et al. 2021

J of Clinical Ultrasound

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Purpose We aimed to investigate the value of posterior fossa ultrasonography measurements in predicting fetal posterior fossa anomaly at 11–14 weeks of gestation. Methods The study was performed at Zeynep Kamil Women and Children's Diseases Training and Research Hospital. Measurements were made in two groups: the control group consisted of 328 fetuses with normal postnatal outcome and the study group consisted of 22 fetuses with enlarged 4th ventricle. In the study group, we questioned the value of intracranial translucency (IT) and brainstem (BS) measurements and the BS/brainstem‐to‐occipital bone (BSOB) ratio in order to predict possible posterior fossa anomalies that may be identified in advanced gestational weeks. The differences of ultrasonographic measurements between groups with p < 0.05 were considered statistically significant. Results IT value, BSOB value, and BS/BSOB ratio were determined as ultrasonographic variables in predicting normal development of the fetal posterior fossa, with cutoff values of 2.7, 5.1, and 0.3. Negative predictive values of these three measurements for posterior fossa abnormalities were 100%. There was no statistically significant difference between the three variables for other diagnostic accuracy values (specifities and positive predictive values) (p > 0.05). Conclusion IT, BSOB, and BS/BSOB ratio can be used as ultrasonographic markers to predict the normal development of the fetal posterior fossa.

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Section: Discussioncontrasting

confidence: 86%

Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 82%

Section: Discussionmentioning

confidence: 95%