American Journal of Neuroradiology, Vol 19, Issue 3 547-549, Copyright © 1998 by American Society of Neuroradiology
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Rhombencephalosynapsis: cerebellar embryogenesis
H Utsunomiya, K Takano, T Ogasawara, T Hashimoto, T Fukushima and M Okazaki
Department of Diagnostic Radiology, Fukuoka University Hospital, Japan.
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.
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