Sonographic diagnosis | Number | Fetal MRI Cerebellar additional findings or changed diagnosis | Management based on US diagnosis. | Management based on fetal MRI diagnosis. | Postnatal MRI for live-birth non-terminated cases |
Post F malformations | |||||
Small retrocerebellar cyst | 1 | Partial vermian agenesis…DW variant | Follow up | Termination if not precious | As fetal MRI |
Mega cisterna magna | 1 | Global cerebellar and vermian hypoplasia | Follow up | Termination if not precious | As fetal MRI |
Chiari malformation | 7 | · Degree of cerebellar herniation including the vermis · Demonstrate of exact site of encephalocele in ChiariIII. · Cerebral associations as corpus callosaldysgenesis · Demonstration of exact site, size and content of meningocele for proper prenatal or postnatal surgery. | Termination on confirmation | · Termination if not precious baby, · If precious baby; fetal MRI additional findings will aid in managmenet especially in prenatal surgery. | As fetal MRI |
DW malformation | 6 | Ø Confirmed vermian agenesis Ø Corpus callosaldysgenesis | Termination | Termination if was diagnosed earlier and if not precious. | As fetal MRI |
Cortical malformation | |||||
Lissencephaly with VM and cleft lip | 1 | Rhomboncephalosynapsis with C.C dysgenesis and z-shaped brain stem…… Walker-Warburg syndrome (WWS) or HARDE syndrome (AR) | Termination if not precious | Lethal form of congenital muscular dystrophy so Termination | ……….. |
Exencephaly | |||||
Hydranencephaly | 1 | Pontocerebellar dysplasia…. Fowler syndrome (AR) | Termination only | Termination with Genetic counseling which confirmed the diagnosis. | ----------- |
Midline anomalies | |||||
Interhemispheric cyst versus schizencephaly | 3 | Cerebellar and vermian compression by the cyst …. confirmed inter-hemispheric cyst. | Needs confirmation as … Follow up if cyst versus termination if schizencephaly | Follow up | As fetal MRI |