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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 20:1151-1153 (6 1999)
© 1999 American Society of Neuroradiology

ARTICLE

Partial Midline Fusion of the CerebellarHemispheres with Vertical Folia:A New Cerebellar Malformation?

Jun-ichi Takanashi^,a, Katsuo Sugita^a, A. James Barkovich^a, Hideyuki Takano^a and Yoichi Kohno^a

^a From the Departments of Pediatrics, (J.T., Y.K.) and Radiology (H.T.), Faculty of Medicine, and the Department of Clinical Medicine (K.S.), Faculty of Education, University of Chiba, Japan; and the Department of Radiology, University of California, San Francisco (A.J.B).

Summary: MR imaging depicted vertically oriented folia instead of the normal horizontal folial pattern, hypoplastic cerebellar vermis, fusion of the inferior posterior cerebellum, and probable polymicrogyria in the superior cerebellar hemispheres in a child with hypotonia, nystagmus, ataxia, and psychomotor retardation. We propose that this newly discovered cerebellar malformation be added to the list of malformations associated with aplasia or hypoplasia of the cerebellar vermis, such as Dandy-Walker malformation, Joubert syndrome, tectocerebellar dysraphia, and rhombencephalosynapsis.

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