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MR Imaging Features of Brain Stem Hypoplasia in Familial Horizontal Gaze Palsy and Scoliosis

A.V. dos Santosa, S. Matiasa, P. Saraivaa and A. Goulãoa

a From the Department of Neuroradiology, Garcia de Orta Hospital, Almada, Portugal


Figure 1
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  		Fig 1. Sagittal T1-weighted image. Hypoplasia of the pons and medulla oblongata. Normal corpus callosum.


Figure 2
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  		Fig 2. Axial T2-weighted image. Deep midsagittal cleft extends ventrally from the fourth ventricular floor originating the split pons sign.


Figure 3
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  		Fig 3. Axial T2-weighted image. Hypoplasia of the medulla oblongata with butterfly morphology.


Figure 4
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  		Fig 4. Axial T2-weighted image. At the level of the pons, the floor of the fourth ventricle is flattened and has a tent shape. Absence of the facial colliculi is notable.





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