Magnetic resonance imaging supplements ultrasonographic imaging of the posterior fossa, pharynx and neck in malformed fetuses

Poutamo, Jaana; Vanninen, Ritva; Partanen, Kaarina; Ryynänen, Markku; Kirkinen, Pertti

doi:10.1046/j.1469-0705.1999.13050327.x

Cited by 54 publications

(33 citation statements)

References 16 publications

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“…From the literature it is clear that in case of bleeding, ischemic abnormalities, hemangiomas and hamartomas, the T1 sequence is preferred [19,24]. In this study there was 1 patient with intraventricular hemorrhage, 1 fetus with PVL and 1 fetus with cavernoic hemangioma and lymphangiomas.…”

Section: Discussionmentioning

confidence: 70%

“…Sonography of a normal posterior fossa anatomy may be difficult because of shadowing from the fetal skull or engaging of the fetal head in the third trimester of pregnancy. MR is helpful in obtaining images on abnormalities in the posterior fossa [20,24,24]. In our 3 patients referred for cerebellar anomalies, a correct diagnosis could be made.…”

Section: Discussionmentioning

confidence: 83%

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Ultrafast Scan Magnetic Resonance in Prenatal Diagnosis

Wagenvoort¹,

Bekker²,

Go³

et al. 2000

Fetal Diagn Ther

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Objective: To determine whether magnetic resonance (MR) can give additional information in prenatal diagnosis of congenital anomalies, when the ultrasound (US) analysis is not conclusive. Methods: Ultrafast MR scanning examined 39 pregnant women with 41 fetuses in whom US was suspicious of fetal congenital abnormalities. Two techniques were used namely (1) HASTE inversion recovery sequence and (2) FISP 2D. Results: Thirty-nine patients with 41 fetuses were referred for MR because of an equivocal US with regard to brain, spine, skeletal and miscellaneous anomalies. In 1 twin pregnancy, 1 co-twin has not been examined with MRI because of its demise. In 22 of them, additional information was obtained by MR. In 9 the MR was confirmative with the US examination. Four were false negative, comparing with the postnatal diagnosis. Three failed because of maternal claustrophobia and in 2 a diagnosis could not be made. From the 40 fetuses in this study, 38 were examined postnatally by MR, US, plain X-ray or autopsy was performed to confirm the prenatal diagnosis. Conclusion: The use of MRI in obstetrics has been limited, until recently. With fast MRI sequences it is not necessary to sedate the fetus. It is advisable in cases where US is equivocal concerning congenital anomalies of the fetus to use MR with fast or ultrafast scan technique, especially when the central nervous system is concerned.

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Section: Discussionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 83%

Ultrafast Scan Magnetic Resonance in Prenatal Diagnosis

Wagenvoort¹,

Bekker²,

Go³

et al. 2000

Fetal Diagn Ther

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“…According to our results, discrepancies between US and MRI findings were often related to structures located in the posterior fossa. Poutamo et al [27] reported that the anatomy of the posterior fossa remained unclear in 8 of 19 cases on US and in one of 19 cases on MRI. Also Oh et al [28] highlighted that for these common posterior fossa anomalies understanding of the anatomy is essential to avoid pitfalls and misdiagnoses.…”

Section: Discussionmentioning

confidence: 99%

The Reliability of Fetal MRI in the Assessment of Brain Malformations

Frick¹,

Fazelnia²,

Kanzian³

et al. 2014

Fetal Diagn Ther

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Objectives: To assess the inter- and intraobserver reliability of different fetal MRI measurements in cases of fetal brain malformations and to examine the concordance between ultrasonography (US) and MRI findings. Methods: Fetal brain MRIs and US findings of 56 pregnant women were retrieved from the institutional database. Standardized fetal brain MRI measurements were performed by 4 observers, and the inter- and intraobserver reliability was determined. Additionally, US and MRI findings were retrospectively compared. Results: The interobserver intraclass correlation coefficient (ICC) was above 0.9 for the cerebellum and posterior horn of the lateral ventricle. The measurements regarding the third ventricle (0.50), the fourth ventricle (0.58), and the corpus callosum (0.63) showed poor reliability. Overall, the intraobserver reliability was greater than the interobserver reliability. US and MRI findings were discordant in 29% of the cases with MRI rendering an extended diagnosis in 18%, a change of diagnosis in 3.6%, and excluding pathological findings suspected on US in 7.1%. Conclusions: Fetal MRI is a valuable complement to US in the investigation of fetal brain malformations. The reliability of most parameters was high, except for the measurements of the third and fourth ventricles and the corpus callosum.

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“…[16][17][18][19][20] Fetal MR imaging is now acknowledged as the method of choice to delineate posterior fossa malformations in a fetus. [21][22][23] However, MR imaging findings in fetuses at risk for JSRD were only reported in the literature in 2 case reports. 24,25 The positive and negative predictive values of MR imaging findings for diagnosing JSRD in utero are not yet known.…”

mentioning

confidence: 99%