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FIG 3. Type 1 disrupted cerebellar development in a preterm infant born at 29 gestational weeks. T1-weighted MR imaging was performed at 7 months.
A, Sagittal image shows normal configuration of the fourth ventricle, a thin corpus callosum, and an inclined tentorium. The vermis is small but normally shaped. Dimensions of the brain stem are reduced.
B and C, Parasagittal (B) and (C) frontal images demonstrate small cerebellar hemispheres immediately beneath the tentorium.
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