PMID: 18421987Apr 22, 2008Paper

Imaging of the brain malformations

Brain and nerve = Shinkei kenkyū no shinpo
A Yagishita

Abstract

Cortical dysplasia (CD) is a malformation predominantly affected cerebral neocortex, resulting in disorganized brain cytoarchitecture. Normal cortical lamination is disturbed and neurons are abnormally located. Adjacent white matter is often involved. Chronic seizures are a clinical feature of developmental disorders of the brain, including CD and agenesis of the corpus callosum. A morphologically distinct form of CD is focal cortical dysplasia (FCD) characterized by the presence of cytomegalic neurons, seen in specimens resected from patients with partial epilepsy. The abnormal area usually appears normal externally, but may on occasion be represented by a wilder than normal gyrus, while the cut surface shows blurred grey-and white-matter demarcation. MR images of FCD show blurred grey-and white-matter demarcation and T2 elongation in the white matter. In our cases of FCD, no calcifications or mass effects were observed. The lesions of FCD also bear some resemblance to those of a forme fruste of tuberous sclerosis (solitary cortical tuber). The cytoarchitectual abnormalities in cortical tubers are, however, much more extensive and a characteristic feature of cortical tubers is the presence of subpial clusters of giant astrocyt...Continue Reading

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