The role of MRI in the prenatal diagnosis and classification of fetal microtia,European Radiology

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The role of MRI in the prenatal diagnosis and classification of fetal microtia
European Radiology ( IF 4.7 ) Pub Date : 2023-06-14 , DOI: 10.1007/s00330-023-09816-5
Xiaodan Zhang ₁ , Weizeng Zheng ₁ , Yan Feng ₂ , Na Yu ₃ , Jiale Qin ₃ , Kui Li ₁ , Guohui Yan ₁ , Yu Zou ₁ , Baohua Li ₂

Affiliation

Objective

To investigate the role of MRI in the diagnosis and classification of fetal microtia.

Methods

Ninety-five fetuses with suspected microtia based on ultrasound and MRI performed within 1 week were enrolled in this study. The diagnosis based on MRI was compared with postnatal diagnosis. Among the microtia cases suspected on the basis of MRI, mild and severe cases were further classified. In addition, external auditory canal (EAC) atresia was evaluated by MRI in 29 fetuses with a gestational age > 28 weeks, and the accuracy of MRI in the diagnosis and classification of microtia was determined.

Results

Of 95 fetuses, 83 were considered to have microtia on the basis of MRI, 81 were confirmed to have microtia, and 14 were found to be normal according to postnatal diagnosis. Among 190 external ears in 95 fetuses, 40 ears were suspected to have mild microtia, and 52 ears were suspected to have severe microtia on the basis of MRI. According to the postnatal diagnosis, mild and severe microtia were confirmed in 43 and 49 ears, respectively. Among the 29 fetuses with a gestational age > 28 weeks, 23 ears were suspected to have EAC atresia according to MRI and 21 ears were ultimately confirmed to have EAC atresia. The accuracy of MRI in diagnosing microtia and EAC atresia was 93.68% and 93.10%, respectively.

Conclusion

MRI shows good performance in diagnosing fetal microtia and has the potential to evaluate its severity on the basis of classification and EAC status.

Clinical relevance statement

This study was aimed at investigating the role of MRI in the diagnosis and classification of fetal microtia. MRI shows good performance and can help evaluate microtia severity and EAC atresia, thus allowing for better clinical management.

Key Points

• MRI is a useful adjunct to prenatal ultrasound.

• MRI has a higher accuracy rate than ultrasound in diagnosing fetal microtia.

• The accurate classification of fetal microtia and the diagnosis of external auditory canal atresia through MRI may help guide clinical management.

中文翻译：

MRI在胎儿小耳畸形产前诊断及分类中的作用

客观的

探讨MRI在胎儿小耳畸形诊断和分类中的作用。

方法

根据 1 周内进行的超声和 MRI 检查，95 名疑似小耳畸形的胎儿被纳入本研究。将基于 MRI 的诊断与产后诊断进行比较。在根据MRI怀疑的小耳症病例中，进一步将轻度病例和重度病例分类。此外，通过MRI对29名胎龄>28周的胎儿进行外耳道（EAC）闭锁评估，并确定MRI在小耳畸形诊断和分类中的准确性。

结果

95名胎儿中，83名经MRI检查被认为患有小耳畸形，81名胎儿确诊为小耳畸形，14名产后诊断正常。 95个胎儿的190只外耳中，根据MRI检查，40只耳朵怀疑有轻度小耳畸形，52只耳朵怀疑有严重小耳畸形。根据产后诊断，轻度小耳症和重度小耳症分别为 43 只和 49 只耳朵。 29例胎龄>28周的胎儿中，MRI检查怀疑23耳为EAC闭锁，最终确诊21耳为EAC闭锁。 MRI诊断小耳畸形和EAC闭锁的准确率分别为93.68%和93.10%。