Prenatal ultrasonic manifestations of fetal rhomboencephalosynapsis
10.13929/j.issn.1003-3289.2024.11.003
- VernacularTitle:胎儿菱脑融合产前超声表现
- Author:
Xinxia WANG
1
;
Hezhou LI
;
Ming WANG
;
Yanhui DONG
;
Ruizheng HAN
;
Ling LIU
;
Songling XU
Author Information
1. 郑州大学第三附属医院超声科,河南郑州 450052
- Keywords:
rhombencephalon;
fetus;
congenital abnormalities;
ultrasonography
- From:
Chinese Journal of Medical Imaging Technology
2024;40(11):1642-1646
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe prenatal ultrasonic manifestations of fetal rhomboencephalosynapsis(RES).Methods Data of 15 singletons with RES were retrospectively analyzed,and the prenatal intracranial and extracranial ultrasonic manifestations were observed.Results All 15 fetuses were found with transverse cerebellar diameter lower than the 3rd percentile of normal value in the same gestational week and bilateral cerebellar hemisphere fusion(15/15,100％).Cerebellar vermis completely loss was observed in 14 fetuses(14/15,93.33％),while partially loss was noticed in 1 fetus(1/15,6.67％).Invisible of the fourth cerebral ventricle was detected in 4 fetuses(4/15,26.67％),while the fourth cerebral ventricular index(4Vi)＜1 was found in 11 fetuses(11/15,73.33％).No"split line"sign between vermis and cerebellar hemisphere was detected.A total of 14(14/15,93.33％)were found with combining intracranial or extracranial malformations,including 13(13/14,92.86％)with other intracranial malformations,10(10/14,71.43％)with extracranial malformations,whereas 1(1/15,6.67％)fetus had no other malformation.Conclusion Prenatal ultrasonic manifestations of fetal RES mainly included small cerebellum transverse diameter,complete or partial loss of vermis,invisible or dysplasia of the fourth cerebral ventricle,fusion of bilateral cerebellar hemispheres,as well as combining with other intracranial and extracranial malformations.
