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

Jun-ichi TakanashiGo,a, Katsuo Sugitaa, A. James Barkovicha, Hideyuki Takanoa and Yoichi Kohnoa

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).



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  		FIG 1. MR findings in a 4-year-old boy with hypotonia, nystagmus, ataxia, and psychomotor retardation.

A, T2-weighted transverse image (3000/100/2 [TR/TE/excitations]) of the inferior cerebellum shows fusion of the cerebellar hemispheres (arrowhead) and dysplastic, vertically oriented, folial-like structures instead of the normally horizontal folia.

B, Coronal T2-weighted image (3000/100/2) shows multifocal cystic lesions in the superior cerebellar hemispheres (arrowhead), a continuous thin layer of white matter (arrow), and a left periventricular leukomalacia.

C, Sagittal T2-weighted image (3000/100/2) shows a small cerebellar vermis (arrowheads).

D, Three-dimensional, fat-saturation, spoiled gradient-echo, surface shaded display image (50/6/1) shows vertically oriented folia.





Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X