[Heterotopic glia in the brain developmental malformations. A histological study (author's transl)]

The authors carried out the histological examination of the heterotopic glia and distinguished 5 architectonic structures: 1. isolated glial formations, 2. mixed: glia-mesenchymal formations, 3. semiinsular formations on the brain surface that the brain warts resembled. The remaining formations (4. and 5.) were heterotopic low differentiated glial and ependymal formations within the white matter. The authors suggest that isolated glial and mixed formations seen above the surface of the brain may derive from the inner cells of primary meninge which preserved the ability to multipotential differentiation, so that these formations couldn't be the result of the disturbed migration of neuroglia.