A−C, A neonate with macrocephaly and a sixth digit on plain film (arrow, A), who underwent MR imaging demonstrating diffuse polymicrogyria on T2WI (arrows,

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Presentation transcript:

A−C, A neonate with macrocephaly and a sixth digit on plain film (arrow, A), who underwent MR imaging demonstrating diffuse polymicrogyria on T2WI (arrows, B and C). A−C, A neonate with macrocephaly and a sixth digit on plain film (arrow, A), who underwent MR imaging demonstrating diffuse polymicrogyria on T2WI (arrows, B and C). A prominent cystic CSP bows the cyst walls laterally (asterisk, C). D, The temporal horns are not overtly dilated on T2WI images (not shown), though the pituitary infundibulum is elongated (arrow), without dilated anterior third ventricular recesses, arguing against frank hydrocephalus (dotted arrows). E, At 8 months of age, the cystic CSP becomes much smaller (asterisk), but with enlarged subarachnoid spaces over the cerebral convexities. The arrows denote polymicrogyria in the midst of progressing myelination. F, The infundibulum is even more difficult to visualize, whereas the brain stem appears slightly small. H.G. Tore et al. AJNR Am J Neuroradiol 2009;30:1620-1622 ©2009 by American Society of Neuroradiology