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Radiology 1986; 160:355-362
In the legend for Figure 3, 1 = cerebral peduncle. The legend for Figure 8 should read: Partial callosal agenesis with Chiari II malformation. (a, b) Parasagittal T1-weighted images, medial to lateral (patient was slightly rotated). The posterior body and splenium of the corpus callosum are absent, but genu and anterior body are intact (arrowheads). The cingulate isthmus is hypoplastic (black arrow). Chiari II malformation is present with herniated cerebellum (outlined arrow) through an enlarged foramen magnum, obliterating the fourth ventricle. Note beaked tectum and pericerebellar cistern. The brain stem is hypoplastic.
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