Figure 6. MRI of a 22 month old boy with macrocephaly harboring a heterozygous mutation in GFAP.
(A) Notice the hyperintesity of the abnormal signal in T2 weighted image predominant in the anterior white matter sparing the U fibres only in the posterior white matter regions; (B) the same areas appear markedly hypointense in the correspondent anterior white matter regions in the T1 weighted images; (C) the abnormal hyperintense T2 weighted signal also involves the white matter of the cerebellum; (D) the predominant anterior swelling aspect indicating increased vacuolation is also clear in the parasaggital T1weighted image.