Contrastive analysis of prenatal MRI and ultrasound diagnosis of posterior fossa malformation
YIN Chunhong
SONG Xiufeng
ZHU Ming
Abstract：Objective To summarize the features of ultrasound(US)and magnetic resonance imaging(MRI)for the fetal posterior fossa cystic abnormalities and to assess the value of US and MRI in the prenatal diagnosis of fetal cerebellar vermis dys-plasia.Methods 30 cases of pregnant women with posterior fossa cystic abnormalities were studied with a 1.5 T superconduc-tive MRI unit within 3 days after ultrasound examination.Diagnostic accuracy of MRI and US was evaluated by comparing with prenatal diagnosis of MRI,US and postnatal diagnosis of MRI or postmortem examination.Results This group of fetal MRI con-firmed the 13 cases of fetal Dandy-Walker malformation by follow-up,1 case of Blake capsule,7 cases of big pillow large pool,and 9 cases of arachnoid cysts in pillow pool.Except one case of diagnosis,of 13 cases of DWM and merge deformity subjected to MRI detection,all were examined by MRI,11 deformities were misdiagnosed by US.15 cases of fetus had no change in arach-noid cyst and cistern after birth.Conclusion MRI is helpful to diagnosis of fetal cerebellar vermis dysplasia and secondary de-formity,which is a beneficial supplement and verification method to fetus US,further perfecting prenatal US diagnosis.
Keywords：Posterior fossa cystic abnormalitiesFetusMagnetic resonance imagingUltrasonography
Publication Date：2025-03-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 87-90 )