title: Rhombencephalosynapsis: cerebellar embryogenesis.
abstract: We describe two infants in whom rhombencephalosynapsis was diagnosed with MR imaging in vivo. In contrast to Dandy-Walker malformation, the vermian maldevelopment in this anomaly is characterized by an absence of the anterior vermis and a deficiency of the posterior vermis. The cerebellar hemispheres are fused. In an attempt to identify the pathogenesis of these anatomic manifestations, we question the traditional concept of the embryologic development of the cerebellar primordium.
authors.affiliation: Department of Diagnostic Radiology, Fukuoka University Hospital, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Utsunomiya
authors.forename: K
authors.initials: K
authors.lastname: Takano
authors.forename: T
authors.initials: T
authors.lastname: Ogasawara
authors.forename: T
authors.initials: T
authors.lastname: Hashimoto
authors.forename: T
authors.initials: T
authors.lastname: Fukushima
authors.forename: M
authors.initials: M
authors.lastname: Okazaki
mesh_terms: D001921:Brain / Q000473:pathology; D002531:Cerebellum / Q000002:abnormalities* / Q000196:embryology* / Q000473:pathology; D002675:Child, Preschool; D005314:Embryonic and Fetal Development / Q000502:physiology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male