Cerebellar Tonsillar Ectopia 2

Fig. 2.1 A 4-year-old child with mild tonsillar ectopia (arrows) on an otherwise negative 1.5 T MRI for developmental delay. Top row: on axial T2WI (left), FLAIR (middle), and coronal IR T2WI (right) there was mild tonsillar ectopia but a lack of mass effect (i.e., herniation) on the cervicomedullary junction, with CSF clearly seen surrounding it. ................
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